Ba-Cu-Si Clathrates: Phase Equilibria and Crystal Chemistry

被引：26

作者：

Yan, X. ^{[1
,2
]}

Giester, G. ^{[3
]}

Bauer, E. ^{[1
]}

Rogl, P. ^{[2
]}

Paschen, S. ^{[1
]}

机构：

[1] Vienna Univ Technol, Inst Solid State Phys, A-1040 Vienna, Austria

[2] Univ Vienna, Inst Phys Chem, A-1090 Vienna, Austria

[3] Univ Vienna, Inst Mineral & Crystallog, A-1090 Vienna, Austria

来源：

JOURNAL OF ELECTRONIC MATERIALS | 2010年 / 39卷 / 09期

关键词：

Clathrate; phase equilibria; crystal chemistry; THERMOELECTRIC PROPERTIES; INTERMETALLIC COMPOUNDS; ENHANCEMENT; FIGURE; AG;

D O I：

10.1007/s11664-010-1253-x

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The formation and crystal chemistry of ternary clathrates in the Ba-Cu-Si system were investigated on a series of compounds Ba8Cux Si46-x (3 <= x <= 8). The phase diagram around the clathrate phase was constructed at 800A degrees C, revealing a homogeneity range from Ba8Cu3.4Si42.6 to Ba8Cu4.8Si41.2. Structural investigations confirmed that the clathrates in this system crystallize with cubic primitive symmetry, in the type I clathrate structure (space group Pm (3) over barn). Single-crystal x-ray diffraction indicates that the Cu atoms partially substitute for Si atoms on the 6d site; no vacancies are observed.

引用

页码：1634 / 1639

页数：6

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