GA-SE BOND LENGTHS AND EXAFS PHASE-SHIFTS IN TETRAHEDRALLY COORDINATED COMPOUNDS

被引：2

作者：

ANTONIOLI, G ^{[1
]}

LOTTICI, PP ^{[1
]}

机构：

[1] CISM,GNSM,I-43100 PARMA,ITALY

来源：

SOLID STATE COMMUNICATIONS | 1990年 / 74卷 / 04期

关键词：

D O I：

10.1016/0038-1098(90)90193-F

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report on a study by the EXAFS (Extended X-ray Absorption Fine Structure) spectroscopy of the GaSe bond lengths in different tetrahedrally coordinated compounds having different degree of internal distortions: the chalcopyrite CuGaSe2, the defect chalcopyrites CdGa2Se4 and ZnGa2Se4 and the defective cubic compound Ga2Se3. The NN distances have been calculated from EXAFS data on Ga K-edge, using CuGaSe2 as reference system for the EXAFS phase shifts. A comparison with theoretical phase shifts is presented. We have found essentially the same GaSe distance in all crystals: the result supports the validity of the CTB (conservation of tetrahedral bond) model. © 1990.

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收藏

页码：313 / 317

页数：5

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