Abstract
The pressure dependences of the spin-Hamiltonian parameters of trivalent chromium in ammonium aluminum alum and potassium cobalticyanide have been measured up to 10 000 kg/cm2 near room temperature. In the case of the alum, runs have been made at 0, 24 and 50°C. The g-value remains unchanged while the crystalline field splitting, δ, increases by ∼30%, (δP)T decreasing with rising temperature and pressure.

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