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

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 been determined by single-crystal X-ray diffraction methods. The compounds are isotypic to each other and to the previously reported Na[Mg(H₂O)₆][M(C₂O₄)₃]...

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Autores principales: Piro, Oscar Enrique, Echeverría, Gustavo Alberto, González Baró, Ana Cecilia, Baran, Enrique José
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Ciencias Exactas
Química
Stepanovite
Zhemchuzhnikovite
Synthetic analogs
Crystal structure
Vibrational spectra
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/130923
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-130923
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
Stepanovite
Zhemchuzhnikovite
Synthetic analogs
Crystal structure
Vibrational spectra
spellingShingle Ciencias Exactas
Química
Stepanovite
Zhemchuzhnikovite
Synthetic analogs
Crystal structure
Vibrational spectra
Piro, Oscar Enrique
Echeverría, Gustavo Alberto
González Baró, Ana Cecilia
Baran, Enrique José
Crystal and molecular structure and spectroscopic behavior of isotypic synthetic analogs of the oxalate minerals stepanovite and zhemchuzhnikovite
topic_facet Ciencias Exactas
Química
Stepanovite
Zhemchuzhnikovite
Synthetic analogs
Crystal structure
Vibrational spectra
description 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 been determined by single-crystal X-ray diffraction methods. The compounds are isotypic to each other and to the previously reported Na[Mg(H₂O)₆][M(C₂O₄)₃]·3H₂O (M: Cr, Al). They crystallize in the trigonal P3c1 space group with 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 solid solution. Comparison of our crystallographic results with previous X-ray diffraction and chemical data of type stepanovite and zhemchuzhnikovite minerals provides compelling evidence that these natural materials possess the same crystal and molecular structure as their synthetic counterparts. It is shown that the originally reported unit cell for stepanovite represents a pronounced sub-cell and that the correct unit cell and space group are based on weak superstructure reflections. The infrared and Raman spectra of both synthetic analogs were also recorded and are briefly discussed.
format Articulo
Articulo
author Piro, Oscar Enrique
Echeverría, Gustavo Alberto
González Baró, Ana Cecilia
Baran, Enrique José
author_facet Piro, Oscar Enrique
Echeverría, Gustavo Alberto
González Baró, Ana Cecilia
Baran, Enrique José
author_sort Piro, Oscar Enrique
title Crystal and molecular structure and spectroscopic behavior of isotypic synthetic analogs of the oxalate minerals stepanovite and zhemchuzhnikovite
title_short Crystal and molecular structure and spectroscopic behavior of isotypic synthetic analogs of the oxalate minerals stepanovite and zhemchuzhnikovite
title_full Crystal and molecular structure and spectroscopic behavior of isotypic synthetic analogs of the oxalate minerals stepanovite and zhemchuzhnikovite
title_fullStr Crystal and molecular structure and spectroscopic behavior of isotypic synthetic analogs of the oxalate minerals stepanovite and zhemchuzhnikovite
title_full_unstemmed Crystal and molecular structure and spectroscopic behavior of isotypic synthetic analogs of the oxalate minerals stepanovite and zhemchuzhnikovite
title_sort crystal and molecular structure and spectroscopic behavior of isotypic synthetic analogs of the oxalate minerals stepanovite and zhemchuzhnikovite
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/130923
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AT echeverriagustavoalberto crystalandmolecularstructureandspectroscopicbehaviorofisotypicsyntheticanalogsoftheoxalatemineralsstepanoviteandzhemchuzhnikovite
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