Compressibility and polymorphism of -As $_{4}$ S $_{4}$ realgar under high pressure

Tuktabiev, M. A.*; Popova, S. V.*; Brazhkin, V. V.*; Lyapin, A. G.*; Katayama, Yoshinori

The energy-dispersive X-ray diffraction technique has been employed to study the structure and equation of state of realgar As $_{4}$ S $_{4}$ under pressures up to 8 GPa at room temperature. We have obtained pressure dependences of the unit cell parameters and volume for the monoclinic structure of realgar. At a pressure of around 7 GPa, realgar showed a polymorph transition to a new molecular phase with a supposedly orthorhombic structure. The phase transition is likely to be associated with the removal of a monoclinic distortion in the unit cell.

Language	:	English
Journal	:	Journal of Physics; Condensed Matter
Volume	:	21
Number	:	38
Pages	:	p.385401_1 - 385401_7
Publication Year/Month	:	2009/08
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Paper URL	:	https://doi.org/10.1088/0953-8984/21/38/385401
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Keywords	:	no keyword
Research Facility	:	SPring-8(大型放射光施設)
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InCites™	:	Percentile:57.91 Category:Physics, Condensed Matter
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Registration No. : AA20100388
JAEA Abstracts No. :
Paper Submission No. : 8067

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Compressibility and polymorphism of -AsS realgar under high pressure

Compressibility and polymorphism of -As $_{4}$ S $_{4}$ realgar under high pressure