Thermodynamics of Cesium Molybdate-Based Single Crystals: Standard Enthalpy of Formation, Lattice Enthalpy, and Heat Capacity

N. I. Matskevich; Мацкевич Н. И.; A. N. Semerikova; Семерикова А. Н.; V. A. Trifonov; Трифонов В. А.; D. A. Samoshkin; Самошкин Д. А.; A. A. Chernov; Чернов А. А.; S. V. Stankus; Станкус С. В.; S. A. Luk’yanova; Лукьянова С. А.; V. N. Shlegel’; Шлегель В. Н.; V. P. Zaitsev; Зайцев В. П.; V. A. Kuznetsov; Кузнецов В. А.

doi:10.31857/S0044457X22601456

Thermodynamics of Cesium Molybdate-Based Single Crystals: Standard Enthalpy of Formation, Lattice Enthalpy, and Heat Capacity

Authors: Matskevich N.I.¹, Semerikova A.N.¹, Trifonov V.A.¹, Samoshkin D.A.¹^,2, Chernov A.A.², Stankus S.V.², Luk’yanova S.A.¹, Shlegel’ V.N.¹, Zaitsev V.P.¹^,3, Kuznetsov V.A.¹
Affiliations:
1. Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences
2. Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences
3. Siberian State University of Water Transport
Issue: Vol 68, No 2 (2023)
Pages: 203-208
Section: ФИЗИЧЕСКИЕ МЕТОДЫ ИССЛЕДОВАНИЯ
URL: https://rjmseer.com/0044-457X/article/view/665304
DOI: https://doi.org/10.31857/S0044457X22601456
EDN: https://elibrary.ru/LPHEOT
ID: 665304

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Abstract

Cs2MoO4 and Li1.9Cs0.1MoO4 crystals were grown from melt by the low-thermal-gradient Czochralski technique. The standard formation enthalpy of cesium molybdate Cs2MoO4 was measured by solution calorimetry. The heat capacity of Li1.9Cs0.1MoO4 was measured by differential scanning calorimetry (DSC) in the temperature range 320–710 K. The lattice enthalpy of Cs2MoO4 was calculated using the Born-Haber cycle. Cesium molybdate was shown to be thermodynamically stable to decomposition into constituent simple oxides (Cs2O and MoO3), which made it promising for application. Li1.9Cs0.1MoO4 experienced no phase transitions in the temperature range 320–710 K.

Keywords

cesium molybdate, standard enthalpy of formation, lattice enthalpy, heat capacity, solution calorimetry, DSC calorimetry

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