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A regression analysis of the temperature dependences of the elasticity coefficients in the cubic phase of BaTiO 3  has been carried out. Two functions are proposed that include one or two critical temperatures ( T 1and  T 2) located in the region of the phase transition to the tetragonal phaseand above the melting point of the single crystalIt is shown that the effective elasticity coefficienthas three minima, one in the region of phase transition to the tetragonal phase, the second near the crystal melting temperature, and the third at a temperaturewhere the bulk modulus of elasticity

Determination of the temperature dependences of the elasticity tensor coefficients in the cubic phase BaTiO 3