The structure of RhMO4, M=Nb, Ta, and Sb

被引：0
|
作者：
Ismunandar [1 ]
Kennedy, BJ
Hunter, BA
机构：
[1] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia
[2] Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia
来源：
EPDIC 5, PTS 1 AND 2 | 1998年 / 278-2卷
关键词：
rutile; neutron diffraction; synchrotron diffraction; rhodium oxide;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The structures of the three ternary rhodium oxides, RhMO4 M = Nb, Ta, and Sb, have been refined by Rietveld-type analysis of combined powder neutron and X-ray synchrotron diffraction data. The oxides are isostructural and adopt a disordered rutile type structure, with a = 4.70186(8), 4.6971(2), and 4.61289(6), c = 3.01685(6), 3.0303(1), and 3.10721(4) Angstrom, and x = 0.2999(3), 0.302(1), and 0.3070(3), for M = Nb, Ta and Sb respectively. The M and Rh atoms are statistically distributed in the 2(a) site. The structure of RhNbO4 and RhTaO4 suggest there is a strong M-M interaction resulting in a contraction of the c/a ratio and in the low value of x, that is absent in RhSbO4.
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页码：714 / 719
页数：6
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