Title

Dimanganese Phosphide, Mn₂P: Heat Capacity from 5 to 350 K, Magnetic Entropy, and Thermodynamic Functions to 1300 K

Abstract

The heat capacity of a sample of Mn2P was determined in the temperature range 5 to 350 K by aneroid adiabatic calorimetry. A small peak in the heat capacity correlated with the antiferromagnetic ordering of the compound was found at (102.5 ± 0.5) K. The associated magnetic entropy was calculated to be (9.43 ± 0.52) J K-1 mol-1. The heat capacity at constant pressure Cp o(298,15 K), the entropy So(298.15 K), the enthalpy Ho(298.15 K) - Ho(0), and the function Go(298.15 K) - Ho(0) 298.15 K were found to be (73.54 ± 0.22) J K-1 mol-1, (91.01 ± 0.27) J K-1 mol-1, (14037 ± 42) J mol-1, and -(43.93 ± 0.13) J K-1 mol-1, respectively. Values of these functions at selected temperatures up to 1300 K are presented in tabular form. The coefficient γ for the contribution of the conduction electrons to the heat capacity (γT) was found to be (23.7 ± 1.6) mJ K-2 mol-1. © 1977.

Department(s)

Chemistry

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1977 Elsevier, All rights reserved.


Share

 
COinS