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Titolo:
PRESSURE-DEPENDENCE OF THE IMMA PHASE OF SILICON
Autore:
MCMAHON MI; NELMES RJ; WRIGHT NG; ALLAN DR;
Indirizzi:
UNIV EDINBURGH,DEPT PHYS & ASTRON,MAYFIELD RD EDINBURGH EH9 3JZ MIDLOTHIAN SCOTLAND
Titolo Testata:
Physical review. B, Condensed matter
fascicolo: 2, volume: 50, anno: 1994,
pagine: 739 - 743
SICI:
0163-1829(1994)50:2<739:POTIPO>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
POWDER-DIFFRACTION; CRYSTAL-STRUCTURE; SI; TRANSITIONS; SUPERCONDUCTIVITY; STABILITY; MODES; GPA; GE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
M.I. Mcmahon et al., "PRESSURE-DEPENDENCE OF THE IMMA PHASE OF SILICON", Physical review. B, Condensed matter, 50(2), 1994, pp. 739-743

Abstract

A detailed structural study of the newly observed orthorhombic phase of silicon (space group Imma) has been made using angle-dispersive powder-diffraction techniques and an image-plate area detector. The Imma phase is found to be stable between 13.2(3) and 15.6(3) GPa, and both the beta-tin-to-Imma and Imma-to-simple-hexagonal transitions are found to be first order with volume changes (DELTAV/V0) of 0.2(1)% and 0.5(1)%, respectively. The volume discontinuities at the transitions are accompanied by pronounced discontinuities in DELTA, the atomic coordinate of the Imma phase, which is found to vary from approximately 0.3 to 0.4 over the stability range of the Imma phase.

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Documento generato il 21/09/20 alle ore 05:15:40