SrTa4O11: a Rietveld Refinement Using Neutron Powder Diffraction Data
Autor: | D. J. W. IJdo, R. B. Helmholdt, G. W. J. C. Heunen |
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Rok vydání: | 1995 |
Předmět: | |
Zdroj: | Acta Crystallographica Section C Crystal Structure Communications. 51:1723-1725 |
ISSN: | 0108-2701 |
Popis: | Rietveld refinement using neutron powder diffraction data for the low-temperature form of strontium tantalum oxide, SrTa 4 O 11 , resulted in R wp = 3.10%. The structure is of the CaTa 4 O 11 type and consists of layers of Ta(2)O 7 pentagonal bipyramids sharing edges, as found in U 3 O 8 . Between the layers lie Sr atoms with distorted cubic coordination geometry and Ta(1) atoms with distorted octahedral coordination geometry. |
Databáze: | OpenAIRE |
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