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Autor Pina Martínez, Carlos Manuel |
Documentos disponibles escritos por este autor (101)
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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[...]