Crystal structure and microtwinning of monoclinic La3SbZn3Ge2O14 crystals of the langasite family

被引：12

作者：

Maksimov, BA

Kazantsev, SS

Molchanov, VN

Verin, IA

Mill, BV

机构：

[1] Russian Acad Sci, AV Shubnikov Crystallog Inst, Moscow 119333, Russia

[2] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119992, Russia

来源：

CRYSTALLOGRAPHY REPORTS | 2004年 / 49卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/1.1780621

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The crystal structure of monoclinic La3SbZn3Ge2O14 crystals from the langasite family is determined by X-ray diffraction analysis [a = 5.202(1) Angstrom, b = 8.312(1) Angstrom, c = 14.394(2) Angstrom, beta = 90.02(1)degrees, sp. gr. A2, Z = 2, and R/R-w=(5.2/4.6)%]. The structure is a derivative of the Ca3Ga2Ge4O14-type structure (a = 8.069 Angstrom, c = 4.967 Angstrom, sp. gr. P321, Z = 1). The crystal studied is a polysynthetic twin with the twin index n = 2, whose monoclinic components are related by pseudomerohedry by a threefold rotation axis of the supergroup P321. (C) 2004 MAIK "Nauka/Interperiodica".

引用

页码：585 / 590

页数：6

共 8 条

[1]

IVANOV S, 2001, ICDD, V51, P51

[2]

Mill B. V., 2004, KRISTALLOGRAFIYA, V49, P65

[3]

Mill' BV, 1998, ZH NEORG KHIM+, V43, P538

[4] Langasite-type materials: From discovery to present state [J].

Mill, BV ;

Pisarevsky, YV .

PROCEEDINGS OF THE 2000 IEEE/EIA INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM & EXHIBITION, 2000, :133-144

[5] Crystal structure and optical activity of La3Nb0.5Ga5.5O14 and Sr3Ga2Ge4O14 single crystals of the langasite family [J].

Molchanov, VN ;

Maksimov, BA ;

Kondakov, AF ;

Chernaya, TS ;

Pisarevskii, YV ;

Simonov, VI .

JETP LETTERS, 2001, 74 (04) :222-225

[6] Thermal expansion of lattice parameters of La3Nb0.5Ga5.5O14, La3Ta0.5Ga5.5O14 and La3SbZn3Ge2O14 [J].

Pavlovska, A ;

Schneider, J ;

Werner, S ;

Maximov, B ;

Mill, B ;

Baetzv, C .

ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 2003, 218 (03) :187-192

[7]

PETRICEK V, 2000, P JANA 2000 I PHYS A

[8] Synthesis and characterization of Sr3TaGa3Si2O14 single crystals [J].

Takeda, H ;

Sato, J ;

Kato, T ;

Kawasaki, K ;

Morikoshi, H ;

Shimamura, K ;

Fukuda, T .

MATERIALS RESEARCH BULLETIN, 2000, 35 (02) :245-252

← 1 →