Temperature Dependence of the Parameters of the Crystalline Lattice of A Single Crystal Tlgase

Umarov Salim  Khallokovich; Narzullaeva Zilola   Mukhitdinovna

Umarov Salim Khallokovich Head of the Department of Biophysics, Bukhara Medical Institute
Narzullaeva Zilola Mukhitdinovna Lecturer at the Department of Biophysics, BMI

Keywords: parameters of the crystal lattice, sensitive, inter plane distance, spatial group

Abstract

Objective. The aim is to study the temperature dependence of the crystal lattice parameters of a TlGaSe2 single crystal and, using these methods, to establish the homogeneity of a TlGaSe2 single crystal suitable for investigating electrophysical, photoelectric, optical, and other properties.

Methods. We studied the temperature dependence of the crystal lattice parameters in TlGaSe2 by X-ray diffraction. The measuring equipment was sensitive to a change in interplanar distance by 0.001 Å, which ensured a high accuracy of the results obtained. The calculations of the lattice parameters were carried out on a computer.

Results. When studying the temperature dependence of the crystal lattice parameters of TlGaSe2, we expected, strong anomalies were found in the temperature dependence a (T). In the entire investigated temperature range (90 - 300 K) ∆c /с > 0. A sharp decrease in the parameter a with increasing temperature is observed at 105 K, and at ~ 120 K, the sign of ∆а / a changes to positive (in a narrow temperature range) ...

Conclusion. На основании порошковых дифрактограмм, точечных электронограмм и рентгенограмм качания вокруг соответствующих кристаллографических осей установлена реальная пространственная группа и уточнены величины параметров решетки этих кристаллов.

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