Heat Capacity and Thermodynamic Properties of Sr2CoWO6 and Sr2NiWO6

National Chemical Laboratory, Pane-.411 008

Department of Chemistry, Indian Institute of Technology, Powai, Bombay-400 076

Manuscript received 29 May 1982, accepted 20 May 1983

The heat capacity (C_p) of the system Sr₂WMeO₆ (Me=Co²⁺, Ni²⁺) has been studied in the temperature range of 290-580 K. Anomalies in heat capacity were observed with a slight hump around 487 K and 526 K for Sr₂CoWO₆. and Sr₂NiWO₆, respectively. These transitions appear to be associated with slight changes in band structure resulting from a structural (tetragonal→cubic) transition.