Crystal Growth and Heat Capacity of Lithium Molybdate Tungstates

Single crystals of lithium molybdate tungstates containing 10 and 15 mol % molybdenum were grown by the low-temperature-gradient Czochralski technique. It was shown that the single crystals have the phenakite structure (space group ). The heat capacity of the Li 2 W 0.85 Mo 0.15 O 4 single crystal w...

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Bibliographic Details
Published in:Russian journal of inorganic chemistry 2022-10, Vol.67 (10), p.1521-1526
Main Authors: Matskevich, N. I., Shlegel’, V. N., Grigorieva, V. D., Samoshkin, D. A., Stankus, S. V., Semerikova, A. N., Kuznetsov, V. A., Novikov, A. Yu
Format: Article
Language:English
Subjects:
Beta decay
Chemistry
Chemistry and Materials Science
Coherent scattering
Crystal growth
Crystal structure
Czochralski method
Inorganic Chemistry
Lithium
Low temperature
Neutrinos
Phase transitions
Single crystals
Specific heat
Synthesis and Properties of Inorganic Compounds
Tungstates
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Summary:Single crystals of lithium molybdate tungstates containing 10 and 15 mol % molybdenum were grown by the low-temperature-gradient Czochralski technique. It was shown that the single crystals have the phenakite structure (space group ). The heat capacity of the Li 2 W 0.85 Mo 0.15 O 4 single crystal was measured by differential scanning calorimetry in two temperature ranges: 190–370 and 320–970 K. The heat capacity in the temperature range 190–970 K is well described by the equation C p = 37.95541 + 0.42875 T − 4.87201 × 10 –4 T 2 + 2.15184 × 10 –7 T   3 J/(K mol). It was determined that there are no phase transitions in the Li 2 W 0.85 Mo 0.15 O 4 single crystal in the studied temperature range. This makes this single crystal promising for the search for rare events, such as neutrinoless double β-decay and elastic coherent neutrino scattering off nuclei.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023622600812