C_r离子在晶体中不仅能以二价和三价形态出现。而且还能以四价以上的形态出现;不仅有六配位情况,而且也能有四配位情况。迄今为止人们对C_r离子络合物的了解主要还在三价离子六配位情况。我们用MS—X_α方法详细计算和研究了C_r~(3+)和C_r~(4+)在O~2四配位情况下的电子能级,得到了理论数据。 C_r ions in the crystal not only in bivalent and trivalent forms. But also in the form of more than four valences; not only with six coordination, but also with four coordination situation. Up to now, the understanding of C_r ion complex mainly lies in the hexavalent coordination state of trivalent ions. We calculated and studied the electron energy levels of C_r ~ (3+) and C_r ~ (4+) in the case of O ~ 2 tetracoordination using the MS-X_α method. Theoretical data were obtained.