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Artículo

Crystal and molecular structure and spectroscopic behavior of isotypic synthetic analogs of the oxalate minerals stepanovite and zhemchuzhnikovite

Piro, Oscar EnriqueIcon ; Echeverría, Gustavo AlbertoIcon ; Gonzalez Baro, Ana CeciliaIcon ; Baran, Enrique JoséIcon
Fecha de publicación: 02/2016
Editorial: Springer
Revista: Physics And Chemistry Of Minerals
ISSN: 0342-1791
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Astronomía

Resumen

The crystal structure of synthetic stepanovite,Na[Mg(H2O)6][Fe(C2O4)3]·3H2O, and zhemchuzhnikovite,Na[Mg(H2O)6][Al0.55Fe0.45(C2O4)3]·3H2O, has beendetermined by single-crystal X-ray diffraction methods.The compounds are isotypic to each other and to the previouslyreported Na[Mg(H2O)6][M(C2O4)3]·3H2O (M:Cr, Al).They crystallize in the trigonal P3c1 space groupwith Z = 6 molecules per unit cell and (hexagonal axes)a = 17.0483(4), c = 12.4218(4) Å for the iron compound,and a = 16.8852(5), c = 12.5368(5) Å for the Al/Fe solidsolution. Comparison of our crystallographic results withprevious X-ray diffraction and chemical data of typestepanovite and zhemchuzhnikovite minerals providescompelling evidence that these natural materials possessthe same crystal and molecular structure as their syntheticcounterparts. It is shown that the originally reported unitcell for stepanovite represents a pronounced sub-cell andthat the correct unit cell and space group are based on weaksuperstructure reflections. The infrared and Raman spectraof both synthetic analogs were also recorded and are brieflydiscussed.
Palabras clave: Stepanovite , Zhemchuzhnikovite , Synthetic Analogues , Crystal Structure , Vibrational Spectra
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/48430
DOI: https://dx.doi.org/10.1007/s00269-015-0793-2
URL: https://link.springer.com/article/10.1007%2Fs00269-015-0793-2
Colecciones
Articulos(CEQUINOR)
Articulos de CENTRO DE QUIMICA INORGANICA "DR. PEDRO J. AYMONINO"
Articulos(IFLP)
Articulos de INST.DE FISICA LA PLATA
Citación
Piro, Oscar Enrique; Echeverría, Gustavo Alberto; Gonzalez Baro, Ana Cecilia; Baran, Enrique José; Crystal and molecular structure and spectroscopic behavior of isotypic synthetic analogs of the oxalate minerals stepanovite and zhemchuzhnikovite; Springer; Physics And Chemistry Of Minerals; 43; 4; 2-2016; 287-300
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