Información del autor
Autor Pina Martínez, Carlos Manuel |
Documentos disponibles escritos por este autor (101)
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Pina Martínez, Carlos Manuel ; Putnis, Cristine Veta ; Becker, Udo ; Biswas, Subir ; Carrol, E.C. ; Bosbach, Dirk ; Putnis, Andrew | Elsevier | 2004The effect of five phosphonic acids (hydroxyethylene diphosphonic acid, HEDP; nitro trimethyl phosphonic acid, NTMP; methylene diphosphonic acid, MDP; amino methylene phosphonic acid, AMP; and sodium phosphonobutane tricarboxylic acid, PBTC) on [...]texto impreso
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High-resolution friction force microscopy has been performed on the (104) surfaces of dolomite and calcite in deionized water. The two rows of oxygen atoms alternating in a zigzag way on top of both surfaces are resolved with similar contrast wh[...]texto impreso
Gnecco, Enrico ; Fajardo, O.Y. ; Pina Martínez, Carlos Manuel ; Juan J., Mazo | Springer Verlag | 2012The static and kinetic friction experienced by a point mass elastically driven at different angles on surface lattices with square, hexagonal, and honeycomb symmetries are estimated by analytical and numeric calculations based on the Prandtl–Tom[...]texto impreso
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Vilhena, J.G. ; Pimentel, Carlos ; Pedraz, Patricia ; Luo, Feng ; Serena, Pedro A. ; Pina Martínez, Carlos Manuel ; Gnecco, Enrico ; Pérez, Rubén | American Chemical Society | 2016The sliding of a sharp nanotip on graphene completely immersed in water is investigated by molecular dynamics (MD) and atomic force microscopy. MD simulations predict that the atomicscale stick?slip is almost identical to that found in ultrahigh[...]texto impreso
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Despite the fact that dolomite is an ubiquitous rock-forming carbonate in the geological record, the mechanism (or mechanisms) of its formation in nature remain elusive. The solution of such a mineralogical problem does [...]texto impreso
In this paper, we present in situ atomic force microscopy (AFM) observations of the interaction between celestite (SrSO4) (001) surfaces and Na2CO3 aqueous solutions. The observations indicate that the interaction is characterized by a rapid alt[...]texto impreso
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Pina Martínez, Carlos Manuel ; López-Acevedo Cornejo, María Victoria ; Pimentel Guerra, Carlos ; Toja Aguirre, Miguel ; Otero Díaz, Luis Carlos ; Ávila Brande, David ; Arenas Esteban, Daniel ; Crespo López, Ángel | 2019-06-21El objetivo de este proyecto es la creación de nuevo material didáctico para la enseñanza de la cristalografía. En concreto, se presentan videoclips divulgativos sobre la forma y estructura de los cristales, los procesos básicos de cristalizació[...]texto impreso
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The crystallisation behaviour in the SrCl2–Na2SO4–H2O system at room temperature is strongly modified by the presence of dissolved silicon. Homogeneous nucleation experiments show that silicon inhibits the formation of celestite while promoting [...]texto impreso
Pina Martínez, Carlos Manuel ; Fernández-Díaz, Lourdes ; Prieto Rubio, Manuel | Elsevier Science B.V. | 1997The crystallization sequences in the system (NH4)2SO4 Li2SO4-H20 at 50C have been studied for solutions with an initial [(NH4)2SO4]/[LizSO4] molar ratio higher than l. The crystal growth experiments were carried out under isothermal conditions i[...]texto impreso
Checa, Antonio G. ; Mutvei, Harry ; Osuna-Mascaró, Antonio J. ; Bonarski, Jan T. ; Faryna, Marek ; Berent, Katarzyna ; Pina Martínez, Carlos Manuel ; Rousseau, Marthe Rousseau ; Macías-Sánchez, Elena | 2013Nacre tablets of mollusks develop two kinds of features when either the calcium carbonate or the organic portions are removed: (1) parallel lineations (vermiculations) formed by elongated carbonate rods, and (2) hourglass patterns, which appear [...]texto impreso
Checa, Antonio G. ; Bonarski, Jan T. ; Willinger, Marc G. ; Faryna, Marek ; Berent, Katarzyna ; Kania, Bogusz ; González-Segura, Alicia ; Pina Martínez, Carlos Manuel ; Pospiech, Jan ; Morawiec, Adam | The Royal Society | 2013-09-06The calcitic prismatic units forming the outer shell of the bivalve Pinctada margaritifera have been analysed using scanning electron microscopy–electron back-scatter diffraction, transmission electron microscopy and atomic force microscopy. In [...]texto impreso
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Pina Martínez, Carlos Manuel ; Pimentel Guerra, Carlos ; Crespo López, Ángel | Elsevier Science B.V., Amsterdam. | 2020-08-05Dolomite is a carbonate mineral frequently found in sedimentary rocks from Proterozoic to Holocene. In the Iberian Peninsula, dolomites appear in a wide number of geological formations and they can be considered as representative of dolomites cr[...]texto impreso
Pina Martínez, Carlos Manuel ; López-Acevedo, María Victoria | International Union of Crystallography | 2016A careful inspection of the drawings and baked clay models created by the mineralogist Romé de L’Isle in the 18th century has revealed the existence of a number of intriguing forms with pentagonal symmetries. These forms cannot be classified in [...]texto impreso
Benages-Vilau, Raúl ; Calvet, Teresa ; Cuevas Diarte, Miguel Ángel ; Pimentel, Carlos ; Pina Martínez, Carlos Manuel | American Chemical Society | 2013In this article, we present a study of the epitaxial growth of nitratine (NaNO3) on calcite (CaCO3) from ethanolic solutions. By using sodium nitrate saturated solutions in ethanol we were able to observe the initial stages of nitratine crystall[...]texto impreso
Pimentel Guerra, Carlos ; Gnecco, Enrico ; Pina Martínez, Carlos Manuel | American Chemical Society | 2018Growth of otavite (CdCO3) and spherocobaltite (CoCO3) has been promoted on dolomite (10.4) surfaces at room temperature by immersing cleaved dolomite crystals in highly supersaturated solutions with respect to those phases. In situ atomic force [...]texto impreso
Growth of otavite (CdCO3) and spherocobaltite (CoCO3) has been promoted on dolomite (10.4) surfaces at room temperature by immersing cleaved dolomite crystals in highly supersaturated solutions with respect to those phases. In situ atomic force [...]texto impreso
Pimentel, Carlos ; Gnecco, Enrico ; Pina Martínez, Carlos Manuel | American Chemical Society | 2018-09-06Growth of otavite (CdCO3) and spherocobaltite (CoCO3) has been promoted on dolomite (10.4) surfaces at room temperature by immersing cleaved dolomite crystals in highly supersaturated solutions with respect to those phases. In situ atomic force [...]texto impreso
Epitaxial growth of calcite on dolomite and kutnahorite (104) surfaces has been promoted at room temperature by immersing cleavage rhombohedra of these minerals in highly supersaturated solutions with respect to calcite (?calcite = [a(Ca2+)·a(CO[...]texto impreso
Sánchez Pastor, Nuria ; Pina Martínez, Carlos Manuel ; Astilleros García-Monge, José Manuel ; Fernández-Díaz, Lourdes ; Putnis, Andrew | Elsevier | 2005In situ AFM experiments have been conducted in order to obtain information about kinetics of celestite epitaxial growth on barite. Growth has been promoted by passing aqueous solutions supersaturated with respect to celestite over freshly cleave[...]texto impreso
Agmon, Liron ; Shahar, Itai ; Yosufov, Danny ; Pimentel Guerra, Carlos ; Pina Martínez, Carlos Manuel ; Gnecco, Enrico ; Berkovich, Ronen | Nature Publishing Group | 2018-03-16Friction force microscopy (FFM) in aqueous environments has recently proven to be a very effective method for lattice-resolution imaging of crystal surfaces. Here we demonstrate the use of ethanol for similar measurements on water-soluble materi[...]texto impreso
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Pina Martínez, Carlos Manuel ; López Andrés, Sol ; Rull Pérez, Fernando ; Prieto Colorado, Carmelo ; Fernández-Díaz, Lourdes ; Prieto Rubio, Manuel | Sociedad Española de Mineralogía | 1992The transformation of phosgenite into cerussite in a diffusing-reacting system has been studied. This transformation occurs in a narrow pH range. Mass-transfer and pH evolution in the system during the process was testified. The transformation d[...]texto impreso
Pina Martínez, Carlos Manuel ; López Andrés, Sol ; Rull Pérez, Fernando ; Prieto Colorado, Carmelo ; Fernández-Díaz, Lourdes ; Prieto Rubio, Manuel | Congreso Geológico de España | 1992The transformation of phosgenite into cerussite in a diffusing-reacting system has been studied. This transformation occurs in a narrow pH range. Mass-transfer and pH evolution in the system during the procesa was testified. The transformation d[...]texto impreso
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Pimentel Guerra, Carlos ; Mougin, Karine ; Gnecco, Enrico ; Pina Martínez, Carlos Manuel | Elsevier | 2020-11-15Cleaved dolomite (CaMg(CO3)2) crystals were immersed in supersaturated, saturated, and undersaturated solutions with respect to zabuyelite (Li2CO3), and the growth process was characterized using atomic force microscopy (AFM) and scanning electr[...]texto impreso
Pina Martínez, Carlos Manuel ; Pimentel Guerra, Carlos ; Gnecco, Enrico | Springer International Publishing Switzerland | 2015Lateral Force Microscopy (LFM) is a very suitable technique to investigate the structure and reactivity of mineral surfaces in liquids. Studies performed in the last two decades have shown that the dissolution and growth of mineral surfaces imme[...]texto impreso
YuHang, Chen ; Asenjo Barahona, Agustina ; Sánchez Pastor, Nuria ; Fernández-Díaz, Lourdes ; Gómez Herrero, Julio ; Pina Martínez, Carlos Manuel | Elsevier | 2007Crystal growth has been promoted in the fluid cell of an Atomic Force Microscope (AFM) by passing Ba–Sr–SO4 aqueous solutions over barite (001) cleavage surfaces. Steps advance in structural continuity with the original barite (001) surfaces and[...]texto impreso
Pina Martínez, Carlos Manuel ; Fernández-Díaz, Lourdes ; López García, José Ángel ; Prieto Rubio, Manuel | Elsevier Science B.V. | 1995Isothermal crystallization in the system Na2SO4-Li2SO4-H20 was carried out at 50°C by "salting out" in a tetrametoxysilane (TMS) gel medium. Under these conditions the solid phases that can crystallize are Na2SO4, Li2SO4 . H20 and ?-LiNaSO4, dep[...]texto impreso
The trigonal b-LiNaSO4 low temperature polymorph belongs to the family of double sulphates with general formula LiMSO4 (M ¼ Na; NH4, Rb,y), which have very specific electrical properties. In this paper we present the b-LiNaSO4 theoretical growth[...]texto impreso
In this paper, we present high-resolution friction force microscopy (FFM) images of the (100) face of kyanite (Al2SiO5) immersed in water. These images show an almost rectangular lattice presumably defined by the protruding oxygen of AlO6 polyhe[...]texto impreso
In this paper we present high resolution atomic force microscopy (AFM) images of dolomite (104) cleavage surfaces immersed in pure water. These images show a rectangular lattice with surface unit cell dimensions in general agreement with those d[...]texto impreso
Little is known about the physico-chemical processes that lead to the formation of dolomite in nature. Issues requiring further investigation include: (1) the role played by amorphous carbonate precursors, (2) the mechanisms of transformation of[...]texto impreso
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Pérez Garrido, Carlos ; Fernández-Díaz, Lourdes ; Pina Martínez, Carlos Manuel ; Prieto Rubio, Manuel | Elsevier | 2007In situ atomic force microscopy (AFM) observations of the interaction between calcite ð1014Þ surfaces and Cd-bearing aqueous solutions have been carried out, by maintaining the solutions static in the AFM fluid cell. The interaction involves the[...]texto impreso
Pina Martínez, Carlos Manuel ; Fernández-Díaz, Lourdes ; Prieto Rubio, Manuel ; Putnis, Andrew | Elsevier Science Ltd | 2000The dissolution–reprecipitation reaction of phosgenite (Pb2Cl2CO3) to cerussite (PbCO3) has been observed in situ in a fluid cell of an atomic force microscope (AFM). The (001) face of phosgenite, in contact with static carbonated aqueous soluti[...]texto impreso
Crystal growth inhibition by non-incorporating impurities has been described and quantified since 1958 by the so-called step pinning model by Cabrera and Vermilyea [1]. In the original model, as well as in its recent improvements by Weaver et al[...]texto impreso
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Gómez, Santiago de Antonio ; Pina Martínez, Carlos Manuel ; Martín-Bragado, Ignacio | American Chemical Society | 2013In this paper, we present simulations of twodimensional islands on the barite (001) face. These simulations were performed with MMonCa, a computer code based on the kinetic Monte Carlo technique. Our results are in excellent agreement with previ[...]texto impreso
López-Acevedo, Victoria ; Pina Martínez, Carlos Manuel | Universidad Complutense de Madrid | 2015-02Tanto los cristales como los cuasicristales están formados por infinidad de átomos ordenados. La diferencia radica en que, en los primeros, este orden es periódico, mientras que en los cuasicristales, no lo es y muestran simetrías consideradas “[...]texto impreso
La Cristalografía es la ciencia que estudia la estructura, propiedades y formación de los cristales, así como la interacción de éstos con la radiación. El desarrollo de la Cristalografía como una ciencia moderna es el resultado de un esfuerzo ex[...]texto impreso
Astilleros García-Monge, José Manuel ; Pina Martínez, Carlos Manuel ; Fernández Díaz, Lurdes ; López Andrés, Sol | Wiley-VCH Verlag | 1998The crystallisation of malachite has been studied in a system involving the counter diffusion of Cu2+ and CO3 through a silica gel column at 25 ºC. In such a system supersaturation is a function of time and position along gel column. Under these[...]texto impreso
Heydenreich, Gunnar ; Spring, Marika ; Stillhammerova, Martina ; Pina Martínez, Carlos Manuel | James & James | 2005Malachite of spherulitic particle form is generally thought to be synthetic in origin. However, it could be mineral malachite formed by natural precipitation from flowing water. Agricola described a source of this type in Neusohl (Banská Bystric[...]texto impreso
Pina Martínez, Carlos Manuel ; Fernández-Díaz, Lourdes ; Prieto Rubio, Manuel ; Veintemillas Verdagher, Sabino | Elsevier Science B.V. | 2001In this paper we derive equations for evaluating the supersaturation, b, and the supersaturation rate, Rb, for the drowning-out crystallisation under isothermal conditions and assuming a constant rate of the addition of the co-solvent. Such equa[...]texto impreso
Astilleros García-Monge, José Manuel ; Pina Martínez, Carlos Manuel ; Fernández-Díaz, Lourdes ; Putnis, Andrew | Elsevier Science B.V., Amsterdam. | 2003In situ atomic force microscopy (AFM) experiments, scanning electron microscopy (SEM) imaging and composition analysis, and X-ray diffraction have provided information about the growth, dissolution and transformation processes promoted by Sr2 + [...]texto impreso
Pina Martínez, Carlos Manuel ; Bosbach, Dirk ; Prieto Rubio, Manuel ; Putnis, Andrew | Elsevier Science B.V. | 1998Under moderate supersaturation conditions, crystal growth on the barite (0 0 1) surface takes place by the development of two-dimensional nucleation simultaneously with the advancement of molecular-height cleavage steps on the surface. The most [...]texto impreso
López-Acevedo, Victoria ; Pina Martínez, Carlos Manuel ; Vindel, Elena ; Pimentel Guerra, Carlos ; Otero Díaz, Luis Carlos ; Ávila Brande, David ; Crespo López, Ángel | 2016-03-14En este trabajo se aborda el diseño y la construcción de modelos de las cinco redes planas (oblicua, rectangular, rómbica, cuadrada y hexagonal) sobre los que se pueden situar sus elementos de simetría (ejes de rotación, planos de simetría y pla[...]texto impreso
Nita, Pawel ; Pimentel, Carlos ; Luo, Feng ; Milián-Medina, Begoña ; Gierschner, Johannes ; Pina Martínez, Carlos Manuel ; Gnecco, Enrico | Royal Society of Chemistry | 2014The reliability of ultrathin organic layers as active components for molecular electronic devices depends ultimately on an accurate characterization of the layer morphology and ability to withstand mechanical stresses on the nanoscale. To this e[...]texto impreso
Pina Martínez, Carlos Manuel ; Becker, Udo ; Risthaus, Peter ; Bosbach, Dirk ; Putnis, Andrew | Nature Publishing Group | 1998Models of crystal growth have been defined by comparing macroscopic growth kinetics with theoretical predictions for various growth mechanisms. The classic Burton–Cabrera–Frank (BCF) theory predicts that spiral growth at screw dislocations will [...]texto impreso
Álvarez-Asensio, Rubén ; Moreno Ramírez, Jorge S. ; Pimentel, Carlos ; Casado, Santiago ; Matta, Micaela ; Gierschner, Johannes ; Muccioli, Luca ; Yoon, Seong-Jun ; Varghese, Shinto ; Park, Soo Young ; Gnecco, Enrico ; Pina Martínez, Carlos Manuel | American Physical Society | 2017In this work we present friction-force microscopy (FFM) lattice-resolved images acquired on the (100) facet of the semiconductor organic oligomer (2Z,2'Z) ? 3,3'-(1,4-phenylene)bis(2-(4-butoxyphenyl)acrylonitrile) (?-DBDCS) crystal in water at r[...]texto impreso
Astilleros García-Monge, José Manuel ; Pina Martínez, Carlos Manuel ; Fernández-Díaz, Lourdes ; Putnis, Andrew | Elsevier Science Ltd | 2002Abstract—This paper deals with the growth behaviour of the Mn-Ca-CO3-H2O solid solution-aqueous solution system on calcite {1014} surfaces. This system represents a model example, which allows us to study the effect of a number of controlling fa[...]texto impreso
Gnecco, Enrico ; Schirmeisen, Andre ; Pina Martínez, Carlos Manuel ; Becker, Udo | Beilstein-Institut | 2014-11The leitmotif of this Thematic Series is the application of nanotechnology to environmental issues. Since the subject is broad and rapidly evolving it is clearly not possible to completely cover it in the limited space at our disposal. We have r[...]texto impreso
In situ atomic force microscopy (AFM) was used to study the growth behaviour of anglesite (PbSO4) monolayers on the celestite (001) face. Growth was promoted by exposing the celestite cleavage surfaces to aqueous solutions that were supersaturat[...]texto impreso
In situ atomic force microscopy (AFM) was used to study the molecular-scale reactivity of anhydrite (1 0 0), (0 1 0), and (0 0 1) faces exposed to water and CaSO4 aqueous solutions at room temperature. In pure water, dissolution occurs by step r[...]texto impreso
Astilleros García-Monge, José Manuel ; Pina Martínez, Carlos Manuel ; Fernández-Díaz, Lourdes ; Putnis, Andrew | Elsevier | 2003The effect of foreign ions on the growth of pure crystals from aqueous solution is an important topic addressed by both crystal growth, mineral and surface sciences. However, many aspects of the role played by those ions remain unclear. Our atom[...]texto impreso
Astilleros García-Monge, José Manuel ; Pina Martínez, Carlos Manuel ; Fernández-Díaz, Lourdes ; Prieto Rubio, Manuel ; Putnis, Andrew | Elsevier Science B.V., Amsterdam. | 2006This work deals with the growth behaviour of calcite {101¯4} surfaces in contact with multicomponent aqueous solutions containing divalent cations (Ba2+, Sr2+, Mn2+, Cd2+, or Mg2+). The result is the formation of solid solutions, with calcite or[...]texto impreso
Rosenberg, Yoav O. ; Sadeh, Yonatan ; Metz, Volker ; Pina Martínez, Carlos Manuel ; Ganor, Jiwchar | Elsevier | 2014Co-precipitation of Ra and Ba in barite (i.e., the formation of a RaxBa1-xSO4 solid solution) has long been established as an important process that has the potential to control Ra concentration. This process is commonly described by a distribut[...]texto impreso
Pina Martínez, Carlos Manuel ; Fernández-Díaz, Lourdes ; Astilleros García-Monge, José Manuel | Wiley-VCH Verlag | 2000In this paper a study of the nucleation and growth behaviour of scheelite (CaWO4) in a porous medium at 25 º C is presented. The experimental set-up involves the counter diffusion of calcium and tungsten through a silica gel column. This results[...]texto impreso
Putnis, Andrew ; Pina Martínez, Carlos Manuel ; Astilleros García-Monge, José Manuel ; Fernández-Díaz, Lourdes ; Prieto Rubio, Manuel | Royal Society of London | 2003The study of nucleation and growth mechanisms of salts from aqueous solutions, as a function of supersaturation, is described using both macroscopic and microscopic experiments. In situ observations in a fluid cell in an atomic force microscope [...]texto impreso
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The effects of silicic acids on calcite growth are a model for the effects of partially polymerized additives on crystal growth. At alkaline pH, silicic acid polymers coexist with small mono- and oligomers. Atomic force microscopy (AFM) showed t[...]texto impreso
This paper deals with some microscopic phenomena, which occur on crystal surfaces during growth from aqueous solutions. Since crystallisation and crystal-solution interactions are ubiquitous in nature, their study is of relevance for a better un[...]texto impreso
In this article, we first present and discuss eighteenth-century descriptions of minerals that contributed decisively to the development of crystallography. Remarkably, these old crystallographic descriptions included morphologies with symmetrie[...]texto impreso
In this paper we present results of a study of the crystallisation behaviour of the dolomite-analogues norsethite and PbMg (CO3)2 at room temperature and atmospheric pressure. Whereas precipitation of norsethite was previously obtained by mixing[...]texto impreso
Natural sciences have experienced important developments when the insights into both matter and its interaction with the environment advanced to the next scale in space and time – irrespective whether the direction was towards larger or smaller [...]texto impreso
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Sánchez Pastor, Nuria ; Pina Martínez, Carlos Manuel ; Fernández-Díaz, Lourdes | Elsevier Science B.V., Amsterdam. | 2006This paper deals with the relationship between habit and compositional changes in crystals of the BaxSr1xSO4 solid solution at 25 8C and 1 atm. Crystals corresponding to the whole range of compositions of the BaxSr1xSO4 solid solution have been [...]texto impreso
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Pimentel, Carlos ; Shinto, Varghese ; Seong-Jun, Yoon ; Soo Young, Park ; Johannes, Gierschner ; Enrico, Gnecco ; Pina Martínez, Carlos Manuel | Institute of Physics (Great Britain) | 2016Organic semiconductors (OSC) are attracting much interest for (opto)electronic applications, such as photovoltaics, LEDs, sensors or solid state lasers. In particular, crystals formed by small ?-conjugated molecules have shown to be suitable for[...]texto impreso
Astilleros García-Monge, José Manuel ; Pina Martínez, Carlos Manuel ; Fernández-Díaz, Lourdes ; Putnis, Andrew | Elsevier Science Ltd | 2003In this paper, we present a brief review of the thermodynamic equilibrium of binary solid solution–aqueous solution (SS-AS) systems and derive an expression hat allows us to evaluate the supersaturation or undersaturation of a given aqueous solu[...]texto impreso
Koishi, Ayumi ; Fernandez Martinez, Alejandro ; Van Driessche, Alexander E. S. ; Michot, Laurent J. ; Pina Martínez, Carlos Manuel ; Pimentel Guerra, Carlos ; Lee, Byeongdu ; Montes-Hernandez, German | American Chemical Society | 2019Because of the widespread presence of foreign substrates in natural settings, mineral precipitation usually occurs via heterogeneous nucleation. This process is controlled by the interplay between the fluid supersaturation and interfacial energi[...]texto impreso
Kawai, Shigeki ; Pina Martínez, Carlos Manuel ; Bubendorf, Alexander ; Fessler, Gregor ; Glatzel, Thilo ; Gnecco, Enrico ; Meyer, Ernest | IOP publishing ltd | 2013We have investigated the morphology and structure of dolomite MgCa.CO3/2.104/ surfaces by bimodal dynamic force microscopy with flexural and torsional resonance modes in ultra-high vacuum at room temperature. We found that the surface slowly dec[...]texto impreso
Fernández-Díaz, Lourdes ; Pina Martínez, Carlos Manuel ; Astilleros García-Monge, José Manuel ; Sánchez-Pastor, Nuria | Mineralogical Society of America | 2009In this paper, we present an experimental study of the interaction between gypsum (010) surfaces and aqueous solutions of Na2CO3 with different concentrations. This interaction leads to the carbonatation (i.e., the transformation into carbonate [...]texto impreso
Pina Martínez, Carlos Manuel ; Enders, Michael ; Putnis, Andrew | Elsevier Science B.V., Amsterdam. | 2000In this paper we present a new approach to the problem of the crystallisation in solid solution–aqueous solution (SS–AS) systems, in which two main controlling factors have been considered: (i) the supersaturation state of the multicomponent sol[...]texto impreso
Astilleros García-Monge, José Manuel ; Pina Martínez, Carlos Manuel ; Fernández-Díaz, Lourdes ; Putnis, Andrew | Elsevier Science Ltd | 2000In situ atomic force microscopy (AFM) experiments have provided information about the effect of Ba21 on crystal growth of calcite {101¯4} surfaces. The microtopographic features observed have been interpreted by considering both the structural c[...]texto impreso
Sánchez Pastor, Nuria ; Pina Martínez, Carlos Manuel ; Fernández-Díaz, Lourdes ; Astilleros García-Monge, José Manuel | Elsevier | 2006The growth of barite {001} and {210} faces from aqueous solutions moderately supersaturated with respect to barite (?barite ? 12 for experiments on {001} surfaces and ?barite ? 7 for experiments on {210} surfaces) and bearing different concentra[...]texto impreso
Reaction pathways and cation ordering mechanisms involved in the formation of the mineral dolomite in nature still remain poorly understood. This is mainly due to the experimental problems posed by the synthesis of dolomite at ambient conditions[...]texto impreso
Pina Martínez, Carlos Manuel ; Putnis, Andrew ; Astilleros García-Monge, José Manuel | Elsevier Science B.V., Amsterdam. | 2004In this paper, we present a generalisation of the classical growth rate equations to the case of crystallisation in solid solution–aqueous solution (SS-AS) systems. In these new equations, basic growth parameters, interfacial free energy and sup[...]texto impreso
The nucleation kinetics of binary solid solutions, with general formula BxC1xA, crystallising from aqueous solution can be described using a generalised expression for the nucleation rate: the function, J(x), in which supersaturation, interfacia[...]texto impreso
Fernández-Díaz, Lourdes ; Astilleros García-Monge, José Manuel ; Pina Martínez, Carlos Manuel | Elsevier Science B.V., Amsterdam. | 2006Calcite crystals were grown in the presence of small concentrations (50, 200, and 600 ppm) of divalent cations (Ba2+, Sr2+, Co2+ and Mn2+) in a silica hydrogel medium. The calcite crystals grown in the presence of cations larger than Ca2+ (Ba2+ [...]texto impreso
Pina Martínez, Carlos Manuel ; Checa, A.G. ; Saínz-Díaz, C.I. ; Cartwhright, J.H.E. | European Space Agency, Advanced Concepts Team | 2013Nacre is a much appreciated natural material which forms in the interior of numerous mollusc shells. Its remarkable optical and mechanical properties are due to a highly nanostructured combination of inorganic and organic components, which has n[...]texto impreso
Celestite (SrSO4) single crystals immersed in highly concentrated Na2CO3 aqueous solutions (0.5?mol/l) are progressively pseudomorphised by aggregates of strontianite (SrCO3) crystals at ambient conditions. This replacement occurs by the couplin[...]texto impreso
Pina Martínez, Carlos Manuel ; Fernández-Díaz, Lourdes ; Prieto Rubio, Manuel | Elsevier Science B.V. | 1996The crystallization of phosgenite (Pb2ClzCO 3) and cerussite (PbCO 3) has been carried out by counter diffusion in a silica hydrogel at 25°C. The crystallization of both phases is strongly controlled by the pH of the medium. Under certain condit[...]texto impreso
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Macías-Sánchez, Elena ; Willinger, Marc G. ; Pina Martínez, Carlos Manuel ; Checa, Antonio G. | Nature Publishing Group | 2017Currently a basic tenet in biomineralization is that biominerals grow by accretion of amorphous particles, which are later transformed into the corresponding mineral phase. The globular nanostructure of most biominerals is taken as evidence of t[...]texto impreso
La tesis doctoral que aquí se presenta trata de las secuencias de cristalización que se observan dentro de los sistemas ternarios m2so4-li2so4-h2o (m= na, rb, nh4) a 50 grados c y 1 atm. La cristalización se produjo en el interior de un gel de t[...]texto impreso
Vendrasco, Michael J. ; Checa, Antonio G. ; Squires, Richard R. ; Pina Martínez, Carlos Manuel | Society for Sedimentary Geology | 2018Nanoscale details of original aragonite crystals and organic inclusions are preserved in shells from the Pennsylvanian Buckhorn Asphalt of Oklahoma, USA. Exceptional preservation occurred because, either during or shortly after deposition, oil m[...]