Synthesis and properties of GdMCr2O5 (M = Na, K, Cs)

被引：0
|
作者：
B. K. Kasenov
S. Zh. Davrenbekov
E. S. Mustafin
Sh. B. Kasenova
S. T. Edil’baeva
E. K. Zhumadilov
机构：
[1] Kazakh Ministry of Education and Science,Institute of Phytochemistry
来源：
Inorganic Materials | 2006年 / 42卷
关键词：
Phase Transition; Inorganic Chemistry; Heat Capacity; Calorimeter; Chromite;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The GdMCr2O5 (M=Na, K, Cs) chromites are synthesized from Gd2O3, Cr2O3, and M2CO3 by solid-state reactions and are shown to have a tetragonal structure. The heat capacity of the chromites is measured from 298.15 to 673 K using a heat-pulse calorimeter. The data for GdKCr2O5 and GdCsCr2O5 show anomalies at 373 and 398 K, respectively, attributable to a second-order phase transition. The best fit equations for the Cp0(T) data are derived. Electrical measurements in the range 303–383 K attest to semiconducting behavior of the chromites.
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页码：68 / 74
页数：6
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