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RESEARCH PRODUCT

Phase transitions in i-butylammonium halogenoantimonate(III) and bismuthate(III) crystals

Jan BaranP. FrançoisRyszard JakubasGrażyna BatorJacek ZaleskiJ. Jóźków

subject

DiffractionPhase transitionInfraredChemistryOrganic ChemistryBismuthateDielectricThermal expansionAnalytical ChemistryInorganic ChemistryCrystallographychemistry.chemical_compoundDifferential scanning calorimetryFourier transform infrared spectroscopySpectroscopy

description

Abstract Differential scanning calorimetry, dielectric, thermal expansion, infrared and preliminary X-ray diffraction studies on i-butylammonium halogenoantimonate(III) and bismuthate(III) crystals are reported. All crystals: (i-C4H9NH3)2BiCl5, (i-C4H9NH3)2SbBr5, (i-C4H9NH3)3BiCl6, (i-C4H9NH3)3Bi2Br9, (i-C4H9NH3)3Sb2Br9, show one or more structural phase transitions of first order type. The values of the transition entropies suggest that the most of the phase transitions are of the order-disorder type. The infrared studies confirmed the contribution of the i-butylammonium cations in the phase transition mechanism.

yearjournalcountryeditionlanguage
1997-12-01Journal of Molecular Structure
https://doi.org/10.1016/s0022-2860(97)00213-5