Thermodynamic aspects of the magnetic transitions in the chromium tellurides Heat Capacities of Cr₅Te₆, Cr₃Te₄ and Cr₂Te₃ from 5 to 350°K

Abstract

Abstract Heat capacities of three chromium tellurides representing the compounds Cr 5 Te 6 and Cr 3 Te 4 with monoclinically‐deformed structures, and Cr 2 Te 3 with hexagonal structure were determined over the range from 5 to 350°K. Values of the heat capacities, enthalpy functions, and entropy increments are tabulated at selected temperatures. At 298.15°K the entropy increments (S 298.15 –S o o ) in cal gfw −1 °K −1 are 10.228 for Cr 0.4546 Te 0.5454 [i. e., (Cr 5 Te 6 )/11], 10.008 for Cr 0.4286 Te 0.5714 [i. e., (Cr 3 Te 4 )/7], and 9.973 for Cr 0.4000 Te 0.6000 [i. e., (Cr 2 Te 3 )/5]. Transitional entropy increments of about 1.7, 1.1, and 1.0 cal/(g atom Cr °K) are associated with λ‐type maxima in the heat capacity at 327, 300, and 172°K, in Cr 5 Te 6 , Cr 3 Te 4 , and Cr 2 Te 3 respectively and are correlated with the magnetic properties.