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

Bulat Kunurovich Kasenov, С. Ж. Давренбеков, Е. С. Мустафин, S. T. Edil’baeva, E. K. Zhumadilov

2006

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DOI 10.1134/s0020168506010146
Data confidence 70 medium
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Abstract

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 C p 0 (T) data are derived. Electrical measurements in the range 303–383 K attest to semiconducting behavior of the chromites.