Pressure dependence of the electric field gradient at Cd impurities in antimony

The electric field gradient at¹¹¹Cd in Antimony was studied at hydrostatic pressures up to 7 kbar at 150 K, 293 K and 473 K. The logarithmic pressure derivatives, dlnq/dP, were found to be –67, –37 and –26 Mbar^–1 respectively. The isotropic volume dependence derived from these values was found to be positive and largely responsible for the anomalous temperature dependence, previously observed.