Berger, T. and Range, Klaus-Jürgen (1996) Two metasilicates with vierer single chains: High-pressure synthesis and structure refinement of Sr-2(VO)(2)Si4O12 (Haradaite) and Sr-2(TiO)(2)Si4O12. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, 51 (8). pp. 1099-1103. ISSN 0932-0776, 1865-7117
Full text not available from this repository.Abstract
Single crystals of Sr-2(VO)(2)Si4O12 could be obtained by high-pressure high-temperature reaction of a SrSiO3/SiO2/V2O5 mixture in a modified Belt-type apparatus. The green crystals are orthorhombic, space group Cmcm, with a = 5.3139(3), b = 14.6281(7), c = 7.0329(4) Angstrom and Z = 2. The structure comprises vierer single chains of SiO4 tetrahedra, the resulting Si4O12 units being connected by VO5 square pyramids. There is one short distance (V - O = 1.61(1) Angstrom) within the square pyramid, giving definite evidence to a (VO)(2+) group with a V=O double bond. The crystal structure of microcrystalline Sr-2(TiO)(2)Si4O12, obtained by high-pressure high-temperature reaction of a SrSiO3/SiO2/TiO2 mixture, was refined by the Rietveld technique. The compound (Cmcm, a = 5.3530(2), b = 14.4864(7), c = 7.0817(3) Angstrom, Z = 2) is isostructural with the vanadium compound.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | metasilicates; vierer single chains; high-pressure synthesis; crystal structure |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Alumni or Retired Professors > Prof. Dr. Klaus-Jürgen Range |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 Jul 2023 07:44 |
| Last Modified: | 04 Jul 2023 07:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/51591 |
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