Crystal structure of K2.47Nb2.85Ti1.15P2.5O17

被引：6

作者：

Alekseeva, OA

Sorokina, NI

Blomberg, MK

Verin, IA

Losevskaya, TY

Voronkova, VI

Yanovskii, VK

Simonov, VI

机构：

[1] Russian Acad Sci, Inst Crystallog, Moscow 117333, Russia

[2] Univ Helsinki, Dept Phys, FIN-00170 Helsinki, Finland

[3] Moscow MV Lomonosov State Univ, Moscow 119899, Russia

来源：

CRYSTALLOGRAPHY REPORTS | 2001年 / 46卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

Potassium; Crystallization; Crystal Structure; Diffraction Analysis; Ionic Transport;

D O I：

10.1134/1.1358389

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The structure of a crystal frown by crystallization from flux in the K2O-TiO2-Nb2O5-P2O5 system was studied by the methods X-ray diffraction analysis at room temperature. The crystals of the composition K2.47Nb2.85Ti1.15P2.5O17 are monoclinic, a = 13.7564(7) Angstrom, b = 6.4075(3) Angstrom, c = 16.9383(7) Angstrom, beta = 83.15(1)degrees, sp. gr. P2/n. The structure was solved by the direct method using the SHELXS86 program package and refilled by the JANA96 program. The crystal structure consists of a three-dimensional framework of sharing-vertices (Nb,Ti)O-6-octahedra and the PO4-tetrahedra and two types of channels along the diagonal [101] direction, which are statistically occupied by potassium cations providing ionic transport in the compound. (C) 2001 MAIK "Nauka/Interperiodica".

引用

页码：176 / 181

页数：6

共 6 条

[1]

Chernaya TS, 1997, CRYSTALLOGR REP+, V42, P375

[2] Structure and properties of niobium-doped potassium titanyl phosphate crystals [J].

Losevskaya, TY ;

Alekseeva, OA ;

Yanovskii, VK ;

Voronkova, VI ;

Sorokina, NI ;

Simonov, VI ;

Stefanovich, SY ;

Ivanov, SA ;

Eriksson, S ;

Zverkov, SA .

CRYSTALLOGRAPHY REPORTS, 2000, 45 (05) :739-743

[3]

Muradyan L. A., 1989, METHODS STRUCTURAL A, P5

[4]

PETRICEK V, 1996, JANA96 CRYSTALLOGRAP

[5]

Sheldrick G. M., 1986, SHELXS 86 PROGRAM SO

[6]

TORDJMAN I, 1974, Z KRISTALLOGR, V139, P103

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