alpha-ScVSe2O8, beta-ScVSe2O8, and ScVTe2O8: New Quaternary Mixed Metal Oxides Composed of Only Second-Order Jahn-Teller Distortive Cations
- Authors
- Kim, Yeong Hun; Lee, Dong Woo; Ok, Kang Min
- Issue Date
- Oct-2013
- Publisher
- AMER CHEMICAL SOC
- Citation
- INORGANIC CHEMISTRY, v.52, no.19, pp 11450 - 11456
- Pages
- 7
- Journal Title
- INORGANIC CHEMISTRY
- Volume
- 52
- Number
- 19
- Start Page
- 11450
- End Page
- 11456
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/14222
- DOI
- 10.1021/ic401769s
- ISSN
- 0020-1669
1520-510X
- Abstract
- Three new quaternary scandium vanadium selenium/tellurium oxides, alpha-ScVSe2O8, beta-ScVSe2O8, and ScVTe2O8 have been synthesized through hydrothermal and standard solid-state reactions. Although all three reported materials are stoichiometrically similar, they exhibit different crystal structures: alpha-ScVSe2O8 has a three-dimensional framework structure consisting of ScO6, VO6, and SeO3 groups. beta-ScVSe2O8 reveals another three-dimensional framework composed of ScO7, VO5, and SeO3 polyhedra. ScVTe2O8 shows a layered structure with ScO6, VO4, and TeO4 polyhedra. Interestingly, the constituent cations, that is, Sc3+, V5+, Se4+, and Te4+ are all in a distorted coordination environment attributable to second-order Jahn-Teller (SOJT) effects. Complete characterizations including infrared spectroscopy, elemental analyses, thermal analyses, dipole moment calculation, and the magnitudes of out-of-center distortions for the compounds are reported. Transformation reactions suggest that alpha-ScVSe2O8 may change to beta-ScVSe2O8, and then to Sc-2(SeO3)(3)center dot H2O under hydrothermal conditions.
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