Ferroelectricity and phase transitions in tris (dimethylammonium) nonabromodiantimonate (III)
Authors:
- 1 August 1987
- journal article
- research article
- Published by Taylor & Francis in Ferroelectrics
- Vol. 74 (1) , 339-345
Abstract
The crystals of tris (dimethylammonium) nonabromodiantimonate (III) (DMABA) were grown which show two phase transitions at 164 and 228 K. Below 164 K the crystal possesses the ferroelectric properties. At room temperature the crystal is isomorphous with the chlorine derivative: the space group P21/a, a = 14.612(8), b = 9.228(4), c = 10.005(8) Å, β = 94.91(6)°, Z = 2. The substantial differences between bromine and chlorine compounds result, most probably, from the fact that NH2 … Br hydrogen bonds are slightly weaker than NH2 … Cl bridges.Keywords
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