The crystal structure of Sr2TiSi2O8

被引：59

作者：

Höche, T

Neumann, W

Esmaeilzadeh, S

Uecker, R

Lentzen, M

Rüssel, C

机构：

[1] Humboldt Univ, Inst Phys, Lehrstuhl Kristallog, D-10115 Berlin, Germany

[2] Stockholm Univ, Dept Inorgan Chem, Arrhenius Lab, S-10691 Stockholm, Sweden

[3] Inst Kristallzuchtung, D-12489 Berlin, Germany

[4] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

[5] Univ Jena, Otto Schott Inst Glaschem, D-07743 Jena, Germany

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2002年 / 166卷 / 01期

关键词：

Sr2TiSi2O8; incommensurate modulation; aperiodic structure; modulation domain boundaries; single-crystal growth; high-resolution transmission electron microscopy; fresnoite;

D O I：

10.1006/jssc.2002.9545

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Sr2TiSi2O8 single crystals were grown by Czochralski pulling and from a high-temperature solution. X-ray diffractometry revealed the modulated crystal structure of Sr2TiSi2O8 to belong to the 5D superspace group P4bm (- alpha, alpha, 1/2; alpha, alpha, 1/2) with alpha = 0.3. Atomic positions, anisotropic displacement factors and positional modulation parameters for Sr2TiSi2O8 are determined and discussed. The positional modulation is further investigated by electron diffraction and high-resolution transmission electron microscopy. In the latter experiments, the 2D modulation appears to be superimposed by some 1D modulation waves. This effect is discussed in terms of growth conditions. (C) 2002 Elsevier Science (USA).

引用

页码：15 / 23

页数：9

共 35 条

[1]

ALFORS JT, 1965, AM MINERAL, V50, P314

[2]

[Anonymous], INT TABLES CRYSTALLO

[3]

Bindi L, 2001, ACTA CRYSTALLOGR B, V57, P739, DOI 10.1107/SO108768101014495

[4] BOND-VALENCE PARAMETERS FOR SOLIDS [J].