Thermal expansion of TlInX2 (X = S, Se, Te)
Source abstract
Abstract
The thermal expansion coefficients of THnS2, TlInSe2, and TlInTe2 were measured in the range 77– 350 K. The data for both single-crystal and polycrystalline TlInS2 were found to exhibit features attributable to ferroelectric and commensurate-incommensurate phase transitions. The measured thermal expansion coefficients of THnS2, TlInSe2, and TlInTe2 were used to calculate the Debye temperatures and root-mean-square dynamic atomic displacements. In going from TlInS2 to TlInSe2 and to TlInTe2, the Debye temperature increases and the root-mean-square atomic displacement decreases, which can be attributed to the increase in bond ionicity.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Solid-state spectroscopy and crystallography · Nonlinear Optical Materials Research · Crystal Structures and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (7)
Show source-provided references
1. Volkov, A.A., Goncharov, Yu.T., Kozlov, G.V.,et al., Structural Phase Transitions in TlInS2 Crystals,Fiz. Tverd. Tela (Leningrad), 1983, vol. 25, no. 12, pp. 3583–3585.
2. Allakhverdiev, K.R., Babaev, S.S., Bakhyshev, N.A.,et al., Anomalous Temperature Variation of the Near-Edge Electronic Spectrum of TIInS2,Fiz, Tekh. Poluprovodn. (Leningrad), 1984, vol. 18, no. 7, pp. 1307–1309.
3. Gadzhiev, V.A., Kurbanov, M.M., Zeinalov, N.M.,et al., Electroabsorption and Thermal Expansion of ß-THnS2,Izv. Akad. Nauk SSSR, Neorg. Mater., 1990, vol. 26, no. 9, pp. 1325–1327.
4. Aldzhanov, M.A., Guseinov, N.G., and Mamedov, Z.N., Heat Capacity of TlInS2-TlInSe2 Crystals,Fiz, Tverd. Tela (Leningrad), 1988, vol. 30, no. 2, p. 580.
5. Rizak, I.M., Rizak, V.M., Vysochanskii, Yu.M.,et al., Influence of Defects on the Heat Capacity Anomalies Related to Structural Phase Transitions of Sn2PrS6 Type Crystals,Ukr. Fiz, Zh, (Russ. Ed.), 1992, vol. 37, no. 8, pp. 1262–1268.
6. Sirota, N.N.,Fizika i fiziko-khimicheskii analiz (Physics and Physicochemical Analysis), Moscow: Sudpromgiz, 1957, issue 1.
7. Frantsevich, N.N.,Voprosy poroshkovoi metallurgii i prochnosti materialov (Problems in Powder Metallurgy and Materials Strength), Kiev: Akad. Nauk Ukr. SSR, 1956, issue 3.