Determination of valence states of chromium in calcium chromates by using X-ray absorption near-edge structure (XANES) spectroscopy

被引：0
|
作者：
Arcon, I
Mirtic, B
Kodre, A
机构：
[1] Sch Environm Sci, Nova Gorica 5001, Slovenia
[2] Jozef Stefan Inst, Ljubljana 1000, Slovenia
[3] Univ Ljubljana, Fac Nat Sci & Engn, Dept Geol, Ljubljana 1000, Slovenia
[4] Univ Ljubljana, Fac Math & Phys, Dept Phys, Ljubljana 1000, Slovenia
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1998年 / 81卷 / 01期
关键词：
D O I：
暂无
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Calcium chromates with the empirical formulas Ca10Cr6O25, Ca3Cr2O8, and Ca5Cr4O12, which form at temperatures >900 degrees C at CaO:Cr2O3 molar ratios of greater than or equal to 3 in an oxidation atmosphere have been synthesized in the pure state. X-ray absorption near-edge structure (XANES) spectroscopy has been used to determine the average valence state of chromium in the samples. The presence of unusual chromium valence states, 4+ and 5+, which was proposed via X-ray diffractometry studies, is strongly supported.
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页码：222 / 224
页数：3
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