Observation of isomorphic phase transition in non-perovskite Green CsSnI3

被引：4
|
作者：
Bharti, Prem C. [1 ]
Jha, Pardeep K. [1 ]
Jha, Priyanka A. [1 ]
Singh, Prabhakar [1 ]
机构：
[1] Banaras Hindu Univ, Indian Inst Technol, Dept Phys, Varanasi 221005, India
来源：
MATERIALIA | 2023年 / 27卷
关键词：
Perovskite halides; CsSnI3; Phase transitions;
D O I：
10.1016/j.mtla.2022.101646
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The green polymorph of CsSnI3 synthesized by cold-sintering method with cubic phase at 295(+/- 1) K is found. The structural refinement shows the cubic Th(m-3)-Pa3 phase with paramorphic hemihedry (diacisdodecahed-ery) for CsSnI3. The determined lattice constants with s.u. values are a = 12.2771(1) angstrom with cell volume = 1850.49(4) angstrom 3. The Iodine atoms do not occupy the equivalent positions and the number of molecules per unit cell is 8. Contrary to other colour polymorphs, this green CsSnI3 has shown successive isomorphic phase transitions in accordance with the group-subgroup theory.
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页数：5
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