论文部分内容阅读
The title compound,tetramethylammonium nickel nitrite[(CH_3)_4Nl[Ni(NO_2)_3],has a hexagonal perovskite-type structure with formula ABX_3.It undergoes two reversible phase transitions occurring at about 409.1 and 428.4 K,associated with dielectric transitions.DSC measurement and dielectric measurement confirm the transition.The variable-temperature X-ray structural determinations and the powder X-ray diffraction(PXRD) experiments reveal that this compound has the same space group P3 m 1(No.164) at 293 K,413 K and 438 K.The phase transitions are caused by the rotation of the[(CH_3)_4N]~+cation.
The title compound, tetramethylammonium nickel nitrite [(CH_3) _4Nl [Ni (NO_2) _3], has a hexagonal perovskite-type structure with formula ABX_3.It undergoes two reversible phase transitions occurring at about 409.1 and 428.4 K, associated with dielectric transitions. DSC measurement and dielectric measurement confirm the transition. The variable-temperature X-ray structural determinations and the powder X-ray diffraction (PXRD) experiments reveal that this compound has the same space group P3 m 1 (No.164) at 293 K, 413 K and 438 K. The phase transitions were caused by the rotation of the [(CH_3) _4N] ~ + cation.