Structural phase transitions in InSb to 66 GPa

Journal Article · Fri Dec 15 00:00:00 EST 1989 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.40.12450· OSTI ID:7158084

Vanderborgh, C A; Vohra, Y K; Ruoff, A L ^[1]

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1. Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853-1501 (US)

Phase transitions in InSb were studied with use of energy-dispersive x-ray diffraction with a synchrotron source to pressures of 66 GPa. InSb transformed from the quasi-fourfold-coordinated zinc-blende structure to a quasi-sixfold-coordinated orthorhombic structure (InSb(IV)) at 2.5 GPa. Previous workers have claimed that the structure of orthorhombic InSb(IV) is disordered with space group {ital Pmm}2. From the results of recent theoretical calculations, we suggest that the structure of InSb(IV) is ordered and has space group {ital Amm}2. Around 6 GPa, InSb transformed to another phase which subsequently continuously transformed to a quasi-eightfold-coordinated hexagonal structure. Upon a further increase in pressure to 28{plus minus}3 GPa, the sample transformed to an eightfold-coordinated cubic CsCl-type structure (if ordered) or to a bcc structure (if disordered). The structure remains cubic to at least 66 GPa, the highest pressure attained in this study. Both the hexagonal phase and the cubic phase are new phases of InSb. On the basis of theoretical calculations, all of these structures are expected to be ordered. The similarities between this phase-transition sequence in InSb and those of other III-V compounds as well as the isoelectronic element Sn are also discussed.

• OSTI ID: 7158084
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 40:18; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
INDIUM ANTIMONIDES
CRYSTAL-PHASE TRANSFORMATIONS
HEXAGONAL LATTICES
ORTHORHOMBIC LATTICES
SPACE GROUPS
SPHALERITE
SYNCHROTRON RADIATION
VERY HIGH PRESSURE
X-RAY DIFFRACTION
ANTIMONIDES
ANTIMONY COMPOUNDS
BREMSSTRAHLUNG
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
ELECTROMAGNETIC RADIATION
INDIUM COMPOUNDS
MINERALS
PHASE TRANSFORMATIONS
PNICTIDES
RADIATIONS
SCATTERING
SULFIDE MINERALS
360603* - Materials- Properties