In this paper, by using the bond length dependence of Racah parameter B obtained from the high pressure spectroscopy of MgO:Ni2+ crystal, the local compressibility around the impurity ion in nickel-doped CaO crystal has been determined from the pressure-induced spectral shifts. The result is greater than that in the pure CaO crystal. The reasonableness of this local value is discussed.
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acad sinica,int ctr mat phys,shenyang 110015,peoples r china.;zheng, wc (reprint author), sichuan univ,dept mat sci,chengdu 610064,peoples r china
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