The pseudo-binary mercury chalcogenide alloy HgSe0.7S0.3 at high pressure: A mechanism for the zinc blende to cinnabar reconstructive phase transition

D. P. Kozlenko; K. Knorr; L. Ehm; S. Hull; B. N. Savenko; V. V. Shchennikov; V. I. Voronin

doi:10.1088/0953-8984/15/14/310

The pseudo-binary mercury chalcogenide alloy HgSe_0.7S_0.3 at high pressure: A mechanism for the zinc blende to cinnabar reconstructive phase transition

D. P. Kozlenko
, K. Knorr
, L. Ehm
, S. Hull
, B. N. Savenko
, V. V. Shchennikov
, V. I. Voronin

Geosciences

Joint Institute for Nuclear Research
Kiel University
Harwell Campus
Inst for Physics of Metals

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

7 Scopus citations

Abstract

The structure of the pseudo-binary mercury chalcogenide alloy HgSe_0.7S_0.3 has been studied by x-ray and neutron powder diffraction at pressures up to 8.5 GPa. A phase transition from the cubic zinc blende structure to the hexagonal cinnabar structure was observed at P ∼ 1 GPa. A phenomenological model of this reconstructive phase transition based on a displacement mechanism is proposed. Analysis of the geometrical relationship between the zinc blende and the cinnabar phases has shown that the possible order parameter for the zinc blende-cinnabar structural transformation is the spontaneous strain e₄. This assignment agrees with the previously observed high pressure behaviour of the elastic constants of some mercury chalcogenides.

Original language	English
Pages (from-to)	2339-2349
Number of pages	11
Journal	Journal of Physics Condensed Matter
Volume	15
Issue number	14
DOIs	https://doi.org/10.1088/0953-8984/15/14/310
State	Published - Apr 16 2003

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title = "The pseudo-binary mercury chalcogenide alloy HgSe0.7S0.3 at high pressure: A mechanism for the zinc blende to cinnabar reconstructive phase transition",

abstract = "The structure of the pseudo-binary mercury chalcogenide alloy HgSe0.7S0.3 has been studied by x-ray and neutron powder diffraction at pressures up to 8.5 GPa. A phase transition from the cubic zinc blende structure to the hexagonal cinnabar structure was observed at P ∼ 1 GPa. A phenomenological model of this reconstructive phase transition based on a displacement mechanism is proposed. Analysis of the geometrical relationship between the zinc blende and the cinnabar phases has shown that the possible order parameter for the zinc blende-cinnabar structural transformation is the spontaneous strain e4. This assignment agrees with the previously observed high pressure behaviour of the elastic constants of some mercury chalcogenides.",

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doi = "10.1088/0953-8984/15/14/310",

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T2 - A mechanism for the zinc blende to cinnabar reconstructive phase transition

AU - Kozlenko, D. P.

AU - Knorr, K.

AU - Ehm, L.

AU - Hull, S.

AU - Savenko, B. N.

AU - Shchennikov, V. V.

AU - Voronin, V. I.

PY - 2003/4/16

Y1 - 2003/4/16

N2 - The structure of the pseudo-binary mercury chalcogenide alloy HgSe0.7S0.3 has been studied by x-ray and neutron powder diffraction at pressures up to 8.5 GPa. A phase transition from the cubic zinc blende structure to the hexagonal cinnabar structure was observed at P ∼ 1 GPa. A phenomenological model of this reconstructive phase transition based on a displacement mechanism is proposed. Analysis of the geometrical relationship between the zinc blende and the cinnabar phases has shown that the possible order parameter for the zinc blende-cinnabar structural transformation is the spontaneous strain e4. This assignment agrees with the previously observed high pressure behaviour of the elastic constants of some mercury chalcogenides.

AB - The structure of the pseudo-binary mercury chalcogenide alloy HgSe0.7S0.3 has been studied by x-ray and neutron powder diffraction at pressures up to 8.5 GPa. A phase transition from the cubic zinc blende structure to the hexagonal cinnabar structure was observed at P ∼ 1 GPa. A phenomenological model of this reconstructive phase transition based on a displacement mechanism is proposed. Analysis of the geometrical relationship between the zinc blende and the cinnabar phases has shown that the possible order parameter for the zinc blende-cinnabar structural transformation is the spontaneous strain e4. This assignment agrees with the previously observed high pressure behaviour of the elastic constants of some mercury chalcogenides.

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DO - 10.1088/0953-8984/15/14/310

M3 - Article

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SN - 0953-8984

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JF - Journal of Physics Condensed Matter

IS - 14

ER -

The pseudo-binary mercury chalcogenide alloy HgSe_0.7S_0.3 at high pressure: A mechanism for the zinc blende to cinnabar reconstructive phase transition

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