Open AccessСтруктура и термодинамические свойства SmGaGe-=SUB=-2-=/SUB=-O-=SUB=-7-=/SUB=-
Author(s) -
Л.Т. Денисова,
М.С. Молокеев,
Л.А. Иртюго,
В.В. Белецкий,
Н.В. Белоусова,
В.М. Денисов
Publication year - 2020
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2020.02.48887.579
Subject(s) - germanate , differential scanning calorimetry , diffraction , heat capacity , calorimetry , materials science , analytical chemistry (journal) , phase (matter) , crystallography , x ray crystallography , chemistry , thermodynamics , physics , optics , organic chemistry , optoelectronics , doping
SmGaGe2O7 has been prepared by solid-phase synthesis in air at temperatures from 1273 to 1473 K using the Sm2O3, Ga2O3, and GeO2 oxides as starting materials. The structure of the studied germanate was determined by X-ray diffraction (space group P2_1 / c; a = 7.18610(9) Angstrem, b = 6.57935(8) Angstrem, c = 12.7932(2) Angstrem). Its high-temperature heat capacity has been measured by differential scanning calorimetry. The obtained experimental dependence C_p = f (T) has been used to evaluate the thermodynamic properties of the compound.