Antifluorite to Ni2In-type phase transition in K2S at high pressures

Vegas, A.; Grzechnik, A.; Hanfland, M.; Mühle, C.; Jansen, M.

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Antifluorite to Ni₂In-type phase transition in K₂S at high pressures

Vegas, A., Grzechnik, A., Hanfland, M., Mühle, C., & Jansen, M. (2002). Antifluorite to Ni₂In-type phase transition in K₂S at high pressures. Solid State Sciences, 4(8), 1077-1081.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000E-EF13-0 Version Permalink: https://hdl.handle.net/21.11116/0000-000E-EF14-F

Genre: Journal Article

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Creators:
Vegas, A., Author
Grzechnik, A.¹, Author
Hanfland, M., Author
Mühle, C.^{2, 3}, Author
Jansen, M.³, Author

Affiliations:
1Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society, ou_3370501
2Department Quantum Materials (Hidenori Takagi), Max Planck Institute for Solid State Research, Max Planck Society, ou_3370487
3Abteilung Jansen, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society, ou_3370503

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Free keywords: high pressure; X-ray powder diffraction; crystal structure; dipotassium sulfide

Abstract: The high-pressure behaviour of dipotassium sulfide K2S with the
antifluorite structure (Fm (3) over barm, Z = 4) has been
studied up to 23.0 GPa by in situ synchrotron angle-dispersive
X-ray powder diffraction in a diamond anvil cell at room
temperature. There occurs a transformation into a distorted
Ni2In-type structure (Pmma, Z = 4) at about 6 GPa upon
compression. A mixture of several phases is observed at lower
pressures. Unlike in the case of pressure-induced modifications
of Li2S and Na2S, none of them is of the anticotunnite-type
(Pnma, Z = 4). The Ni2In-related structure,of K2S is compared
with the cationic arrays found in different polymorphs of K2SO3
and K2SO4. (C) 2002 Editions scientifiques et medicales
Elsevier SAS. All rights reserved.

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Language(s): eng - English

Dates: Date issued: 2002

Publication Status: Issued

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Rev. Type: Peer

Identifiers: eDoc: 7124
ISI: 000178515200011

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Title: Solid State Sciences

Source Genre: Journal

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Pages: - Volume / Issue: 4 (8) Sequence Number: - Start / End Page: 1077 - 1081 Identifier: ISSN: 1293-2558