Temperature coefficients of the electroelastic constants of quartz

In the domain between -40 degrees and 60 degrees C the temperature derivatives of the electroelastic constants of alpha-quartz are on the order of 10(-3) to 10(-4) N/(V-m- degrees C). This is about 100 times less than hitherto believed. The temperature coefficients T(e(ijk)) given in degrees C(-1 ) are on the same order of magnitude. Also contrary to earlier beliefs, available data cannot be used to determine all eight fundamental independent temperature coefficients T(e (ijk)) existing in the basic reference frame of quartz. Only six relevant quantities can be calculated, five of them as linear combinations of the fundamental T(e(ijk)). Their estimates, based on the available data, are given for 25 degrees C.