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Title: Structural evolution in iron tellurates

Abstract

Three new members within the iron tellurate family have been synthesized and characterized by single-crystal diffraction. Fe{sub 2}Te{sub 3}O{sub 9} is orthorhombic, a=7.80240(10)A, b=17.7501(3)A, c=5.28050(10)A, Z=4, space group Pnma, final agreement factors R{sub 1}=0.0261(wR{sub 2}=0.0688) for 1271 independent reflections. Fe{sub 3}Te{sub 4}O{sub 12} is monoclinic, a=9.1312(2)A, b=7.3554(2)A, c=15.7379(3)A, {beta}=107.950(10){sup o}, Z=4, space group P2{sub 1}/c, final agreement factors R{sub 1}=0.0380(wR{sub 2}=0.0281) for 3302 independent reflections. FeTe{sub 6}O{sub 13} is trigonal, a=b=10.16630(10)A, c=18.9330(3)A, Z=6, space group R3-barm, final agreement factors R{sub 1}=0.0309(wR{sub 2}=0.0641) for 1264 independent reflections. Together with the four already known members of the family, Fe{sub 2}TeO{sub 5}, Fe{sub 2}TeO{sub 6}, and Fe{sub 2}Te{sub 3}O{sub 9} (a dimorphic variant of the afore-mentioned structure with the same chemical formula), and Fe{sub 2}Te{sub 4}O{sub 11}, the iron tellurates now span from relatively Fe-rich and Te-poor to relatively Fe-poor to Te-rich compounds. The structural diversity within Fe-Te-O system is discussed in terms of the lone-pair stereochemistry of the Te{sup 4+} anion and the cross-over from Fe{sup 3+} to mixed-valence Fe{sup 3+}/Fe{sup 2+} and Fe{sup 2+} coordination polyhedra compounds.

Authors:
 [1];  [2]
  1. Institut Europeen des Membranes, UMR 5635, cc 047 Universite de Montpellier II, 34095 Montpellier (France), E-mail: avderlee@univ-montp2.fr
  2. Laboratoire de Chimie Moleculaire et Organisation du Solide, UMR 5253, cc 007 Universite de Montpellier II, 34095 Montpellier (France)
Publication Date:
OSTI Identifier:
21015771
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 180; Journal Issue: 4; Other Information: DOI: 10.1016/j.jssc.2007.01.022; PII: S0022-4596(07)00050-3; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DIFFRACTION; IRON COMPOUNDS; IRON IONS; MONOCLINIC LATTICES; MONOCRYSTALS; ORTHORHOMBIC LATTICES; SPACE GROUPS; STEREOCHEMISTRY; TELLURATES; TELLURIUM IONS

Citation Formats

Lee, A. van der, and Astier, R.. Structural evolution in iron tellurates. United States: N. p., 2007. Web.
Lee, A. van der, & Astier, R.. Structural evolution in iron tellurates. United States.
Lee, A. van der, and Astier, R.. Sun . "Structural evolution in iron tellurates". United States. doi:.
@article{osti_21015771,
title = {Structural evolution in iron tellurates},
author = {Lee, A. van der and Astier, R.},
abstractNote = {Three new members within the iron tellurate family have been synthesized and characterized by single-crystal diffraction. Fe{sub 2}Te{sub 3}O{sub 9} is orthorhombic, a=7.80240(10)A, b=17.7501(3)A, c=5.28050(10)A, Z=4, space group Pnma, final agreement factors R{sub 1}=0.0261(wR{sub 2}=0.0688) for 1271 independent reflections. Fe{sub 3}Te{sub 4}O{sub 12} is monoclinic, a=9.1312(2)A, b=7.3554(2)A, c=15.7379(3)A, {beta}=107.950(10){sup o}, Z=4, space group P2{sub 1}/c, final agreement factors R{sub 1}=0.0380(wR{sub 2}=0.0281) for 3302 independent reflections. FeTe{sub 6}O{sub 13} is trigonal, a=b=10.16630(10)A, c=18.9330(3)A, Z=6, space group R3-barm, final agreement factors R{sub 1}=0.0309(wR{sub 2}=0.0641) for 1264 independent reflections. Together with the four already known members of the family, Fe{sub 2}TeO{sub 5}, Fe{sub 2}TeO{sub 6}, and Fe{sub 2}Te{sub 3}O{sub 9} (a dimorphic variant of the afore-mentioned structure with the same chemical formula), and Fe{sub 2}Te{sub 4}O{sub 11}, the iron tellurates now span from relatively Fe-rich and Te-poor to relatively Fe-poor to Te-rich compounds. The structural diversity within Fe-Te-O system is discussed in terms of the lone-pair stereochemistry of the Te{sup 4+} anion and the cross-over from Fe{sup 3+} to mixed-valence Fe{sup 3+}/Fe{sup 2+} and Fe{sup 2+} coordination polyhedra compounds.},
doi = {},
journal = {Journal of Solid State Chemistry},
number = 4,
volume = 180,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}