Phase transition study of the ferroelectric (N(CH3)4)2CoCl4

Specific heat measurements confirm the existence of five phase transitions in (N(CH3)4)2CoCl4 in the 60-330 K temperature range. The thermodynamic function values associated to these phase transitions are closely related with the Zn isomorphous compound although some differences in the low temperature transition set show the role played by the metal ion.