Аннотация:Solid solutions of 4-methylpyridinium bromoiodobismuthates have been isolated from aqueous solutions and structurally characterized. It was found that the composition of the resulting solid solutions [PiH]4Bi2X10, [PiH]BiX4, and [PiH]3Bi2X9 (PiH = 4-methylpyridinium; X = Br, I) depends on the ratio of organic cation/bismuth and bromine/iodine in the initial solution. The existence of two polymorphic modifications of [PiH]BiX4 in the system formed at different ratios of halide ions has been demonstrated. Possible reasons for the unequal occupation of halogen positions in the crystal lattice by different halogen atoms are analyzed.
