High-pressure phase transformation studies in gadolinium to 106 GPa

Jagannadham Akella; Gordon S. Smith; Andrew P. Jephcoat

doi:10.1016/0022-3697(88)90069-8

High-pressure phase transformation studies in gadolinium to 106 GPa

Jagannadham Akella, Gordon S. Smith, Andrew P. Jephcoat

Institute for Planetary Materials

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

We investigated the high-pressure structural transformations in gadolinium at room temperature. Up to a pressure of 106 GPa, gadolinium metal undergoes four structural transformations: h.c.p.→ Sm-type → d.h.c.p. → f.c.c. → t.h.c.p. The corresponding transformation pressures are: 1.5 ± 0.2 GPa, 6.5 ± 0.5 GPa; onset at 24.0 GPa and completion at 29.0 GPa; and between 44.0 and 55.0 GPa, respectively. We found a much larger stability range for f.c.c.-gadolinium phase than that reported by others.

Original language	English
Pages (from-to)	573-576
Number of pages	4
Journal	Journal of Physics and Chemistry of Solids
Volume	49
Issue number	5
DOIs	https://doi.org/10.1016/0022-3697(88)90069-8
Publication status	Published - 1988

Keywords

Gadolinium
diamond-cell
equation-of-state
megabar

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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abstract = "We investigated the high-pressure structural transformations in gadolinium at room temperature. Up to a pressure of 106 GPa, gadolinium metal undergoes four structural transformations: h.c.p.→ Sm-type → d.h.c.p. → f.c.c. → t.h.c.p. The corresponding transformation pressures are: 1.5 ± 0.2 GPa, 6.5 ± 0.5 GPa; onset at 24.0 GPa and completion at 29.0 GPa; and between 44.0 and 55.0 GPa, respectively. We found a much larger stability range for f.c.c.-gadolinium phase than that reported by others.",

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AU - Akella, Jagannadham

AU - Smith, Gordon S.

AU - Jephcoat, Andrew P.

PY - 1988

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N2 - We investigated the high-pressure structural transformations in gadolinium at room temperature. Up to a pressure of 106 GPa, gadolinium metal undergoes four structural transformations: h.c.p.→ Sm-type → d.h.c.p. → f.c.c. → t.h.c.p. The corresponding transformation pressures are: 1.5 ± 0.2 GPa, 6.5 ± 0.5 GPa; onset at 24.0 GPa and completion at 29.0 GPa; and between 44.0 and 55.0 GPa, respectively. We found a much larger stability range for f.c.c.-gadolinium phase than that reported by others.

AB - We investigated the high-pressure structural transformations in gadolinium at room temperature. Up to a pressure of 106 GPa, gadolinium metal undergoes four structural transformations: h.c.p.→ Sm-type → d.h.c.p. → f.c.c. → t.h.c.p. The corresponding transformation pressures are: 1.5 ± 0.2 GPa, 6.5 ± 0.5 GPa; onset at 24.0 GPa and completion at 29.0 GPa; and between 44.0 and 55.0 GPa, respectively. We found a much larger stability range for f.c.c.-gadolinium phase than that reported by others.

KW - Gadolinium

KW - diamond-cell

KW - equation-of-state

KW - megabar

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