IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Crystal chemistry of organic minerals – salts of organic acids: the synthetic approach
Autor/es:
PIRO, OSCAR ENRIQUE; BARAN, ENRIQUE JOSÉ
Revista:
Crystallography Reviews
Editorial:
Taylor & Francis
Referencias:
Lugar: Oxford; Año: 2018 vol. 24 p. 1 - 27
ISSN:
0889-311X
Resumen:
The term ?organic minerals? means naturally occurring crystallineorganic compounds including metal salts of formic, acetic, citric,mellitic, methanesulfonic and oxalic acids. As for the rest of the(inorganic) minerals, the primary tool to disclose their crystal andmolecular structure and therefore to understand their mutual relationshipwith each other and with synthetic analogues and alsotheir physicochemical properties is X-ray diffraction crystallographyever since the dawn of this methodology in 1913. The structure ofseveral synthetic organic minerals was solved well before the discoveryof their natural counterpart. On the other hand, completecrystal structure determination of early discovered organic mineralshad to await the advent of combined synthetic and advancedX-ray diffraction methods to fully unveil their crystal structures.We review here the crystal chemistry of organic minerals andshow the importance of structural studies on their synthetic analogues.This will be highlighted by case studies on the recentlyreported synthetic novgorodovaite, Ca2(C2O4)Cl2·2H2O, and its heptahydrateanalogue, Ca2(C2O4)Cl2·7H2O, and the isotypic to eachother stepanovite, NaMg[Fe(C2O4)3]·9H2O, and zhemchuzhnikovite,NaMg[AlxFe1−x(C2O4)3]·9H2O.