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用固相法合成了Ｐｒ＿（２－ｘ）Ｓｒ＿ｘＮｉＯ＿（４±δ）（０．０≤ｘ≤１．０）系列Ｋ＿２ＮｉＦ＿４型化合物，研究了其结构，红外光谱，电磁性质。当０．０≤ｘ＜０．１和ｘ＝１．０时以正交晶系结晶；当０．１≤ｘ＜１．０时以四方晶系结晶；Ｎｉ离子平均价态在＋２至＋３价之间。当ｘ值较小时，样品中含有过量的氧。ＮｉＯ＿６八面体中Ｎｉ￣（３＋）的Ｊａｈｎ－Ｔｅｌｌｅｒ畸变引起ｃ／ａ值在ｘ＝０．５处出现极大，在７７～２５０Ｋ之间，样品磁性质符合居里－外斯定律，并表现出反铁磁相互作用。电学性质的变化可以理解为Ｎｉ￣（３＋）离子电子组态由：变至的结果
The series K_2NiF_4 compounds of Pr_ (2-x) Sr_xNiO_ (4 ± δ) (0.0≤x≤1.0) were synthesized by solid state reaction. Their structures, IR spectra and electromagnetism were studied. Crystallizes in an orthorhombic system when 0.0 ≦ x <0.1 and x = 1.0; crystallizes in a tetragonal system when 0.1 ≦ x <1.0; and an average Ni ion valence is in a range of +2 to +3 Between the price. When the value of x is small, the sample contains excess oxygen. The Jahn-Teller distortion of Ni ~ (3+) in NiO_6 octahedron caused the c / a value to be extremely large at x = 0.5, and the magnetic properties of the sample conform to the Curie-Weiss law Anti-ferromagnetic interaction. Changes in electrical properties can be understood as Ni ~ (3+) ion electronic configuration by: the result of the change