【摘要】 本文用模式识别法研究了四元硫族化合物Ａ＿２ＭｎＢＸ＿４的结构类型和磁性类别与Ａ、Ｂ和Ｘ的半径的关系，结果表明ＲＡ越大，Ｒ＿Ｂ和Ｒ＿Ｘ越小越利于生成正交结构，相反则利于生成正方结构。亚稳的立方结构只在Ｒ＿Ｂ和Ｒ＿Ｘ较大的体系生成。从模式识别法表明符合０．０５０Ｒ＿Ｂ＋１．３２２Ｒ＿Ｘ＜３７５．３－Ｒ＿Ａ和２．１１８Ｒ＿Ｂ＋１．０８２Ｒ＿Ｘ＜２３９．３＋Ｒ＿Ａ（其中Ｒ＿Ａ、Ｒ＿Ｂ和Ｒ＿Ｘ的单位是ｐｍ）条件的体系具有铁磁性，相反则具反铁磁性。更多还原

【Abstract】 The relationship between the radius ofA,B,X and the structure types, ferromagnetism orantiferromagnetism types of A₂MnBX₄-typecompounds were studied using pattern recognitionmethod.It can be seen that stable orthorhombicphases form in systems with large A and small B,X,on the other hand, stable tetragonal phases form insystems with small A and large B,X. Themetastable cubic phases form only in systerns withlarge B and X. The criteria of antiferromagnetism are0.058R_B+1.322R_X<375.3-R_A and 2.118R_B+1.082R_X<239.3+R_A.更多还原