ChemInform Abstract: High-Pressure Synthesis, Crystal and Electronic Structure of a New Scandium...
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ChemInform 2010, 41, issue 42 © 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim www.cheminform.wiley-vch.de Tungsten I 5700 DOI: 10.1002/chin.201042017 High-Pressure Synthesis, Crystal and Electronic Structure of a New Scandium Tungstate, Sc0.67WO4. — Insulating Sc2W3O12 is prepared by reaction of Sc2O3 and WO3 (1200 °C, 12 h) and transformed into the new metallic title compound by high-temperature/high-pressure treatment (4 GPa, 1400 °C, 1 h). Sc0.67WO4 crystalliz- es with a defect-rich wolframite-type structure in the monoclinic space group P2/c (powder XRD). The structure contains chains of edge-sharing WO 6 octahedra. Magnet- ic susceptibility, resistivity, thermoelectric power, and IR spectroscopic measurements indicate that the compound is a paramagnet whose conductivity is that of a metal in the presence of weak localization and electron—electron interactions. — (VARGA*, T.; MITCHELL, J. F.; WANG, J.; ARNOLD, L. G.; TOBY, B. H.; MALLIAKAS, C. D.; J. Solid State Chem. 183 (2010) 7, 1567-1573, DOI:10.1016/j.jssc.2010.04.039 ; Environ. Mol. Sci. Lab., Richland, WA 99352, USA; Eng.) — W. Pewestorf 42- 017
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Transcript of ChemInform Abstract: High-Pressure Synthesis, Crystal and Electronic Structure of a New Scandium...
www.cheminform.wiley-vch.de
TungstenI 5700 DOI: 10.1002/chin.201042017
High-Pressure Synthesis, Crystal and Electronic Structure of a New Scandium Tungstate, Sc0.67WO4. — Insulating Sc2W3O12 is prepared by reaction of Sc2O3 and WO3 (1200 °C, 12 h) and transformed into the new metallic title compound by high-temperature/high-pressure treatment (4 GPa, 1400 °C, 1 h). Sc0.67WO4 crystalliz-es with a defect-rich wolframite-type structure in the monoclinic space group P2/c (powder XRD). The structure contains chains of edge-sharing WO6 octahedra. Magnet-ic susceptibility, resistivity, thermoelectric power, and IR spectroscopic measurements indicate that the compound is a paramagnet whose conductivity is that of a metal in the presence of weak localization and electron—electron interactions. — (VARGA*, T.; MITCHELL, J. F.; WANG, J.; ARNOLD, L. G.; TOBY, B. H.; MALLIAKAS, C. D.; J. Solid State Chem. 183 (2010) 7, 1567-1573, DOI:10.1016/j.jssc.2010.04.039 ; Environ. Mol. Sci. Lab., Richland, WA 99352, USA; Eng.) — W. Pewestorf
42- 017
ChemInform 2010, 41, issue 42 © 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
