Phase transition in a chloro-elpasolite,Cs2KInCl6 |
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| Authors: | T. Guedira J. P. Wignacourt M. Drache A. Lorriaux-Rubbens F. Wallart |
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| Affiliation: | 1. Laboratoire de Cristallochimie et Physicochimie du Solide , UA CNRS 452 Ecole Nationale Supérieure de Chimie de Lille , B.P. 108, 59652 , Villeneuve D'Ascq , Cédex , France;2. Laboratoire de Spectroscopie Infra Rouge et Raman , LP CNRS 2641, Université des Sciences et des Techniques de Lille Flandres Artois , Bǎtiment C5, 59655 , Villeneuve D'Ascq , Cédex , France |
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| Abstract: | ![]()
Using high-purity starting materials, we synthesized a new room-temperature Cs2KInCl6 phase (I): monoclinic (C2/c), a = 25.484(11), b = 7.699(2) and c = 13.225(3) Å, β = 100.69(3)°. A ferroelasticparaelastic phase transition is noted at Tc = 100°C (by Thermal Analysis and X-ray, Raman-scattering, electrical permittivity versus temperature) leading to the prototype Fm3m phase(II) with a = 10.870(5) Å, quenchable when very slightly spoiled by impurities. |
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| Keywords: | Phase transition chloroindate Raman scattering ferroelasticity |
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