Order-disorder phase transition in BaCl<sub>2</sub>.2H<sub>2</sub>O crystals
J A F Silva; F E A Melo; J Mendes Filho; F A Germano; J E Moreira
Журнал:
Journal of Physics C: Solid State Physics
Дата:
1986-07-20
Аннотация:
Crystals of BaCl<sub>2</sub>.2H<sub>2</sub>O were studied by Raman spectroscopy and dielectric constant measurements, from 12K to room temperature. Both techniques gave evidence of an order-disorder phase transition occurring around 200K. The conclusion drawn is that half of the water molecules in the unit cell change their site symmetry during the transition.
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