Search results for "ferro-paraelectric phase transition"

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High temperature ferro-paraelectric phase transition in tris(trimethylammonium) nonachlorodiantimonate(III) (TMACA) studied by X-ray diffraction meth…

2000

Abstract The structure of [NH(CH3)3]3Sb2Cl9, tris(trimethylammonium) nonachlorodiantimonate(III) (TMACA) has been determined at 295 K and 373 K, below and above the high temperature ferro-paraelectric phase transition. In both phases the anionic sublattice of TMACA is built of characteristic two-dimensional (Sb2Cl93−)n polyanionic layers lying in the bc plane. In room temperature, ferroelectric phase (monoclinic, Pc space group) there are three crystallographically non-equivalent trimethylammonium [NH(CH3)3]+ cations. Two of them are located between polyanionic layers and the third one, disordered, inside the cavity formed by six SbCl63− octahedra. In the high temperature paraelectric phase…

ferro-paraelectric phase transitionTrisPhase transitionMaterials sciencedisorderGeneral ChemistryDielectricantimony(III)Ferroelectricitychemistry.chemical_compoundCrystallographychemistryOctahedronStructural BiologyLattice (order)Phase (matter)X-ray crystallographyMaterials Chemistrycrystal and molecular structurehalogenoantimonates(III)Monoclinic crystal systemActa Crystallographica Section A Foundations of Crystallography
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