Crystal growth, thermal and linear optical properties of the non-centrosymmetric hydrated tetraborates Na2[B4O5(OH)4] • 3H2O (tincalconite) and K2[B4O5(OH)4] • 2H2O

被引：0
|
作者：
Hellwig, H [1 ]
Becker, P [1 ]
Ahrweiler, S [1 ]
Bohaty, L [1 ]
机构：
[1] Univ Cologne, Inst Kristallog, D-50674 Cologne, Germany
来源：
CRYSTAL RESEARCH AND TECHNOLOGY | 2000年 / 35卷 / 10期
关键词：
hydrated tetraborates; tincalconite; Na-2[B4O5(OH)(4)] center dot 3H(2)O; K-2[B4O5(OH)(4)] center dot 2H(2)O; optical properties; thermal properties;
D O I：
10.1002/1521-4079(200010)35:10<1151::AID-CRAT1151>3.0.CO;2-Q
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Large single crystals of the non-centrosymmetric hydrated tetraborates Na-2[B4O5(OH)(4)].3H(2)O ("tincalconite") (point group 32) and K-2[B4O5(OH)(4)].2H(2)O (point group 222) were grown from aqueous solutions and the linear optical properties (refractive indices between 365 nm and 1530 nm and unpolarized absorption spectra) as a basis for nonlinear optical investigations were determined The uniaxial positive sodium salt is not phase matchable; in the orthorhombic potassium compound type I phase matching is possible in the near infrared region. Thermal investigations indicate a phase transition at similar to 285 K for Na-2[B4O5(OH)(4)].3H(2)O.
引用
收藏
页码：1151 / 1161
页数：11
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