摘要
合成了Ｎｉ替代铁酸稀土复合氧儿物ＬａＦｅ_（１－ｘ）Ｎｉ_ｘＯ_３（ｘ＝０．１～０．６），对样品进行了ＸＲＤ、ＩＲ及Ｍｏｓｓｂａｕｅｒ谱测试。结果表明：ｘ＝０．１，０．２，０．３的样品为正交相，ｘ＝０．５，０．６的样品为菱方相；伴随结构从正交向菱方结构的转变，ＩＲ谱上Ｆｅ（Ｎｉ）－Ｏ键伸缩振动谱带向高频移动近２０ｃｍ^（－１）。Ｍｏｓｓｂａｕｅｒ 谱测试表明Ｆｅ均处于＋３价高自旋态，Ｎｉ离子以＋３价进入晶格．
Pervoskite oxides of LaFe_(1-x)Ni_xO_3(x=0.1～0.6)were prepared by the solid state reaction method.The XRD, IR and Mossbauer measurements show that the samples are all in single phase except for x=0.4; their structures transform from orthorhombic to rhomhombic at x=0. 5.The frequency of Fe(Ni)-O stretching vibration shifts to a high frequency about 20 cm(-1) with a structure transformation. Fe ions are all in high spin state of +3 valence and Ni ions incorporated in lattice are in +3 valence.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第12期1827-1830,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
复合氧化物
镧
铁
穆斯堡尔谱
LaFe_(1-x)Ni_xO_3, Structure transformation,￣(57)Fe Mossbauer spectrum
