低对称畸变和畸变晶场参量

Low symmetry distortion and crystal-field distortion parameters

根据畸变晶场参量的定义,推导了四配位和六配位两种情况下的三角畸变和四角畸变的晶场畸变参量公式,并运用所得的畸变参量公式,讨论了晶体结构畸变对畸变参量正负符号的影响.结果表明:当晶体畸变时,畸变晶场参量符号的变化与畸变的方式(晶体结构沿着对称轴被拉伸和压缩)和配体个数有关.

This paper provides the expressions of the crystal-field distortion parameters lbr transition metal in crystal with four-tangents and six-ligands by its definitions. Exercised by the low symmetry＇ distortion, the influence on the sign symbol of the crystal-field distortion parameters is discussed using these expressions. The results show that the sign symbol of tile crystal-field distortion parameters could be changed by both low symmetry distortion ways, exercised by extension along the symmetry axial or shortening along the symmetry axial, and the numbers ofligands.