Single crystal of a new [(CH3)(2)CHNH3](4)Cd3Cl10 compound was grown and its properties have been characterized by dielectric and dilatometric investigations. Dielectric measurement evidenced the phase transitions at T-1 = 352.8 K, T-2 = 293.5 K and T-3 = 261.5 K on cooling run. Dilatometric measurement of thermal expansion showed clearly two successive phase transitions at T-1 and at T-2. No temperature hysteresis was observed for phase transitions at T-1 and T-2. Large temperature hysteresis was observed at T-3 in dielectric studies. Transitions at T-1 and T-3 are classified as a first order and at T-2 as a continuous one. Anomalies of electric permittivity and expansion connected with the transitions are observed at practically the same temperatures and close to those observed earlier in DSC (Differential Scanning Calorimetry) studies. Results of dilatometric studies were applied to estimate critical coefficient beta for continuous phase transition at T-1 which is equal to 0.40 +/- 0.01. (C) 2011 Elsevier B. V. All rights reserved.