A New High Pressure Phase and the Equation of State of YbH2

J. Staun Olsen; B. Buras; Leif Gerward; B. Johansson; Bente Lebech; Hans Lomholt Skriver; S. Stenstrup

doi:10.1088/0031-8949/29/5/016

A New High Pressure Phase and the Equation of State of YbH2

J. Staun Olsen
, B. Buras
, Leif Gerward
, B. Johansson
, Bente Lebech
, Hans Lomholt Skriver
, S. Stenstrup

Department of Physics

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

High-pressure X-ray diffraction studies have been performed on YbH2 up to 28 GPa. A first order phase transition from an orthorhombic structure to a collapsed hexagonal structure with c/a = 1.34 has been observed at about 15 GPa. The transition is accompanied by a 5.2% decrease in volume. Fitting the V(P) data to Murnaghan's equation of state yields the bulk modulus B0 = 40.2 GPa and its pressure derivative B'0 = 4.75 for the orthorhombic phase. For the hexagonal phase we find the bulk modulus to be B = B0 = 138 GPa independent of pressure, i.e. B'0 = 0.

Original language	English
Journal	Physica Scripta
Volume	29
Issue number	5
Pages (from-to)	503-507
ISSN	0031-8949
DOIs	https://doi.org/10.1088/0031-8949/29/5/016
Publication status	Published - 1984

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@article{12da321fe4d14f7aab584a62d96b1cc3,

title = "A New High Pressure Phase and the Equation of State of YbH2",

abstract = "High-pressure X-ray diffraction studies have been performed on YbH2 up to 28 GPa. A first order phase transition from an orthorhombic structure to a collapsed hexagonal structure with c/a = 1.34 has been observed at about 15 GPa. The transition is accompanied by a 5.2\% decrease in volume. Fitting the V(P) data to Murnaghan's equation of state yields the bulk modulus B0 = 40.2 GPa and its pressure derivative B'0 = 4.75 for the orthorhombic phase. For the hexagonal phase we find the bulk modulus to be B = B0 = 138 GPa independent of pressure, i.e. B'0 = 0.",

author = "\{Staun Olsen\}, J. and B. Buras and Leif Gerward and B. Johansson and Bente Lebech and Skriver, \{Hans Lomholt\} and S. Stenstrup",

year = "1984",

doi = "10.1088/0031-8949/29/5/016",

language = "English",

volume = "29",

pages = "503--507",

journal = "Physica Scripta",

issn = "0031-8949",

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TY - JOUR

T1 - A New High Pressure Phase and the Equation of State of YbH2

AU - Staun Olsen, J.

AU - Buras, B.

AU - Gerward, Leif

AU - Johansson, B.

AU - Lebech, Bente

AU - Skriver, Hans Lomholt

AU - Stenstrup, S.

PY - 1984

Y1 - 1984

N2 - High-pressure X-ray diffraction studies have been performed on YbH2 up to 28 GPa. A first order phase transition from an orthorhombic structure to a collapsed hexagonal structure with c/a = 1.34 has been observed at about 15 GPa. The transition is accompanied by a 5.2% decrease in volume. Fitting the V(P) data to Murnaghan's equation of state yields the bulk modulus B0 = 40.2 GPa and its pressure derivative B'0 = 4.75 for the orthorhombic phase. For the hexagonal phase we find the bulk modulus to be B = B0 = 138 GPa independent of pressure, i.e. B'0 = 0.

AB - High-pressure X-ray diffraction studies have been performed on YbH2 up to 28 GPa. A first order phase transition from an orthorhombic structure to a collapsed hexagonal structure with c/a = 1.34 has been observed at about 15 GPa. The transition is accompanied by a 5.2% decrease in volume. Fitting the V(P) data to Murnaghan's equation of state yields the bulk modulus B0 = 40.2 GPa and its pressure derivative B'0 = 4.75 for the orthorhombic phase. For the hexagonal phase we find the bulk modulus to be B = B0 = 138 GPa independent of pressure, i.e. B'0 = 0.

U2 - 10.1088/0031-8949/29/5/016

DO - 10.1088/0031-8949/29/5/016

M3 - Journal article

SN - 0031-8949

VL - 29

SP - 503

EP - 507

JO - Physica Scripta

JF - Physica Scripta

IS - 5

ER -

A New High Pressure Phase and the Equation of State of YbH2

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