Phase transitions of LnSb (Ln = lanthanide) with NaCl-type structure at high pressures

Citation
J. Hayashi et al., Phase transitions of LnSb (Ln = lanthanide) with NaCl-type structure at high pressures, SOL ST COMM, 114(11), 2000, pp. 561-565
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
0038-1098 → ACNP
Volume
114
Issue
11
Year of publication
2000
Pages
561 - 565
Database
ISI
SICI code
0038-1098(2000)114:11<561:PTOL(=>2.0.ZU;2-D
Abstract
Using synchrotron radiation, X-ray diffraction patterns of LnSb (Ln = Pr, N d, Sm, Gd and Tb) with a NaCl-type structure have been measured up to 30 GP a at room temperature. First-order phase transitions with a crystallographi c change occur at around 13 GPa for PrSb and 15 GPa for NdSb. The structure of the high-pressure phases of both antimonides is tetragonal (Ln: 0,0,0; Sb: 1/2, 1/2, 1/2; space group P4/mmm), and can be viewed as a distorted Cs Cl structure. The structure of the high-pressure phase of LnSb (Ln = La, Ce , Pr and Nd) is more anisotropic compared with that of corresponding LnP. P ressure-induced phase transitions of SmSb, GdSb and TbSb are observed at ar ound 19, 22 and 21 GPa, respectively. (C) 2000 Published by Elsevier Scienc e Ltd. All rights reserved.