Volume 141, Number 2, January 2023
|Number of page(s)||5|
|Section||Condensed matter and materials physics|
|Published online||04 January 2023|
Observation of grey cesium tin bromide with unusual phase transition
Department of Physics, Indian Institute of Technology (Banaras Hindu University) Varanasi Varanasi-221005, India
Received: 18 August 2022
Accepted: 14 December 2022
A new grey colour polymorph of CsSnBr3 with non-cubic phase at 295(±1) K is observed. Contrary to black and yellow polymorphs, it seems that not only the β-α transition at 292 K shifted to 304 K but also the new β3-phase with second-order phase transition (β2-β3) can be seen in this new grey polymorph. The structural refinement shows the monoclinic phase with holohedry for β3-CsSnBr3 against the group-subgroup theory. However, the parameters and are suggesting pseudo-tetragonality for β3-CsSnBr3.
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