摘要
用Ｘ射线粉末法确定了ＲｂＹｂＩ３的晶体结构，并用Ｒｉｅｔｖｅｌｄ技术精化了结构。晶体结构属于正交晶系，ａ＝１０３８３（３）ｎｍ，ｂ＝０４６６７（１）ｎｍ，ｃ＝１７２００（５）ｎｍ，空间群为Ｐｎｍａ（６２），Ｚ＝４，所有原子均占据空间群Ｐｎｍａ的４ｃ位置。Ｙｂ原子被Ｉ原子配位形成畸变的八面体，这些八面体共棱连接形成沿ｂ轴的双链是ＲｂＹｂＩ３晶体结构的特征。
?The crystal structure of RbYBI3 is determined by Xray powder diffraction method, and its crystal structure is refined by Rietveld technique. Its crystal structure is orthorhombic system, a=10383(3) nm, b=04667(1) nm, c=17200(5) nm. The space group is Pnma(62), Z=4, and all of the atoms occupy the 4c positions of the Pnma space group. Each Yb atom is coordinated by six I atoms to form a distorted octahedron . The main feature of the crystal structure of RbYbI3 is two chains along the baxis which are composed of the edgesharing octahedra.
出处
《中国稀土学报》
CAS
CSCD
北大核心
1997年第4期359-362,共4页
Journal of the Chinese Society of Rare Earths
基金
国家科委"八五"攀登计划
国家自然科学基金
北京大学稀土材料化学及应用国家重点实验室资助
关键词
铷
碘
稀土碘化物
晶体结构
RbYbI3
镱
Rare earths, Rubidium, Iodides, Rietveld technique, Crystal structure
