Sm3TaO7: Heat Capacity and Thermal Expansion

The molar heat capacity of Sm 3 TaO 7 was determined by relaxation, adiabatic and differential scanning calorimetry in the region of 2–1350 K and the thermodynamic functions were calculated. The total contribution of the Schottky anomaly to the heat capacities of samarium tantalate was evaluated. Th...

Full description

Saved in:
Bibliographic Details
Published in:Russian journal of inorganic chemistry 2022-12, Vol.67 (14), p.2183-2192
Main Authors: Gagarin, P. G., Guskov, A. V., Guskov, V. N., Nikiforova, G. E., Khoroshilov, A. V., Tyurin, A. V., Gavrichev, K. S.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Crystal lattices
High temperature
Inorganic Chemistry
Mathematical analysis
Orthorhombic phase
Phase transitions
Samarium
Specific heat
Synthesis and Properties of Inorganic Compounds
Temperature dependence
Thermal expansion
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The molar heat capacity of Sm 3 TaO 7 was determined by relaxation, adiabatic and differential scanning calorimetry in the region of 2–1350 K and the thermodynamic functions were calculated. The total contribution of the Schottky anomaly to the heat capacities of samarium tantalate was evaluated. The temperature dependences of the parameters of the orthorhombic crystal lattice of the space group C 222 1 in the temperature range of 300–1204 K have been determined and the coefficients of thermal expansion have been estimated. The temperature dependence of heat capacity of samarium tantalate exhibits an anomaly in the region of 1116–1275 K associated with the structural phase transition. The space group of the high-temperature orthorhombic phase Sm 3 TaO 7 is identified as Cmcm .
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023622602070