Structure and refractive properties of LiNaSO4 single crystals

被引：12

作者：

Shchepanskyi, P. A. ^{[1
,2
]}

Kushnir, O. S. ^{[3
]}

Stadnyk, V. Yo ^{[1
]}

Brezvin, R. S. ^{[1
]}

Fedorchuk, A. O. ^{[4
]}

机构：

[1] Ivan Franko Natl Univ Lviv, Phys Fac, 19 Dragomanov St, UA-79005 Lvov, Ukraine

[2] J Dlugosh Univ Czestochowa, Inst Phys, Armii Krajowej 13-15, PL-42201 Czestochowa, Poland

[3] Ivan Franko Natl Univ Lviv, Fac Elect & Comp Technol, 107 Tarnaysky St, UA-79017 Lvov, Ukraine

[4] Lviv Natl Univ Vet Med & Biotechnol, Dept Inorgan & Organ Chem, 50 Pekarska St, UA-79010 Lvov, Ukraine

来源：

UKRAINIAN JOURNAL OF PHYSICAL OPTICS | 2018年 / 19卷 / 03期

关键词：

lithium-sodium sulphate; ABSO(4) crystals; structure; refractive indices; birefringence; optical anisotropy; LIKSO4; CRYSTALS; X-RAY; BETA-LINASO4; BIREFRINGENCE; SPECTROSCOPY; TEMPERATURE; INDEXES; SULFATE; TL;

D O I：

10.3116/16091833/19/3/141/2018

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report experimental results on the structure, refractive indices and birefringence of LiNaSO4 (LSS) crystals. Spectral behaviours of the refractive indices and the birefringence of LSS at the room temperature, as well as temperature and baric dependences of the birefringence are discussed. We examine the refractive indices and the birefringence using Lorentz-Lorenz and simplified Sellmeier formulae and energy-band structure calculations. Unlike LiKSO4, the birefringence of LSS decreases with increasing temperature, while accidental optically isotropic states are absent under the normal conditions. A significant increase in the birefringence of LSS, if compared with LiKSO4, is assumed to be linked with asymmetry appearing in the local second-coordination environment of the LSS structure.

引用

页码：141 / 149

页数：9

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