The single crystals of (NH(CH3)(3))(2)ZnCl4 (abbreviately (TrMA)(2)ZnC
l4) were grown at room temperature. On the basis Of obtained experimen
tal results one can conclude that crystals of trimethylammoniumtetrach
lorozincates possess two phase transitions at T-c(c) = 276.5 K and T-i
= 310 K. Phase lying below T-c is ferroelectric one. Some specific pr
operties of (TrMA)(2)ZnCl4 in the phase lying between T-c and T-i, all
ow to suggest the existence of incommensurate phase in this range.