Synthesis of ternary compound in H-S-Se system at high pressures*

doi:10.1088/1674-1056/abf7aa

	Synthesis of ternary compound in H-S-Se system at high pressures*
	Zhang, Xiao 1,2
刊名	CHINESE PHYSICS B
	2021-12-01
卷号	30
关键词	hydride high pressure Raman spectroscopy
ISSN号	1674-1056
DOI	10.1088/1674-1056/abf7aa
通讯作者	Zhang, Xiao(xiaozhang@issp.ac.cn)
英文摘要	The chemical reaction products of elemental sulfur (S), selenium (Se), and molecular hydrogen (H-2) at high pressures and room temperature are probed by Raman spectroscopy. Two known compounds H2S and H2Se can be synthesized after laser heating at pressures lower than 1 GPa. Under further compression at room temperature, an H2S-H2Se and an H2S-H2Se-H-2 van der Waals compounds are synthesized at 4 GPa and 6 GPa, respectively. The later is of guest-host structure and can be identified as (H2S)( x )(H2Se)((2-x))H-2. It can be maintained up to 37 GPa at least, and the stability of its H2Se molecules is extended: the H-Se stretching mode can be detected at least to 36 GPa but disappears at 22 GPa in (H2Se)(2)H-2. The pressure dependence of S-H and Se-H stretching modes of this ternary compound is in line with that of (H2S)(2)H-2 and (H2Se)(2)H-2, respectively. However, its hydrogen subsystem only shows the relevance to (H2S)(2)H-2, indicating that this ternary compound can be viewed as H2Se-replaced partial H2S of (H2S)(2)H-2.
WOS关键词	HYDROGEN ; SUPERCONDUCTIVITY ; PHASE ; RAMAN ; LANTHANUM ; HYDRIDE
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000732439200001
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/126900]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhang, Xiao
作者单位	1.Chinese Acad Sci, HFIPS, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xiao. Synthesis of ternary compound in H-S-Se system at high pressures*[J]. CHINESE PHYSICS B,2021,30.
APA	Zhang, Xiao.(2021).Synthesis of ternary compound in H-S-Se system at high pressures*.CHINESE PHYSICS B,30.
MLA	Zhang, Xiao."Synthesis of ternary compound in H-S-Se system at high pressures*".CHINESE PHYSICS B 30(2021).