Chemistry:Pnictogen sesquichalcogenide
Pnictogen sesquichalcogenides, which are often shortened to sesquichalcogenides are a class of molecules with the formula Pn2Ch3, where Pn is a pnictogen (group 15 element) and Ch is a chalcogen (group 16 element). Molecules with the formula Pn2O3 are generally considered as sesquioxides rather than sesquichalcogenides due to differing physical and chemical properties.
Structure
Sesquichalcogenides have two main crystal structures: rhombohedral and orthorhombic.[1]
Properties
Sesquichalcogenides have been shown to possess piezoelectric properties with bismuth indium telluride (BiInTe3) reported to have a piezoelectric coefficient of 362 pm V-1, which is higher than many conventional materials, which makes them of interest for lead free piezoelectric devices.[2]
Examples
- Antimony triselenide - Sb
2Se
3 - Arsenic(III) telluride - As
2Te
3 - Arsenic triselenide - As
2Se
3 - Arsenic trisulfide - As
2S
3 - Bismuth selenide - Bi
2Se
3 - Bismuth telluride - Bi
2Te
3
References
- ↑ Cheng, Yudong; Cojocaru-Mirédin, Oana; Keutgen, Jens; Yu, Yuan; Küpers, Michael; Schumacher, Mathias; Golub, Pavlo; Raty, Jean-Yves et al. (2019). "Understanding the Structure and Properties of Sesqui-Chalcogenides (i.e., V2VI3 or Pn2Ch3 (Pn = Pnictogen, Ch = Chalcogen) Compounds) from a Bonding Perspective" (in en). Advanced Materials 31 (43). doi:10.1002/adma.201904316. ISSN 1521-4095. PMID 31489721. Bibcode: 2019AdM....3104316C.
- ↑ Yin, Huabing; Zheng, Guang-Ping; Wang, Yuanxu; Yao, Bingjian (July 18, 2018). "New monolayer ternary In-containing sesquichalcogenides BiInSe3, SbInSe3, BiInTe3, and SbInTe3 with high stability and extraordinary piezoelectric properties" (in en). Physical Chemistry Chemical Physics 20 (28): 19177–19187. doi:10.1039/C8CP02793E. ISSN 1463-9084. PMID 29978165. Bibcode: 2018PCCP...2019177Y. https://pubs.rsc.org/en/content/articlelanding/2018/cp/c8cp02793e.
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