Synthesis,Crystal Structure and Optical Properties of KPr(MoO_4)_2 with the Scheelite-type Structure  

作　　者：赵丹 程文旦 谢知 张浩 张炜龙 杨松林 耿磊 

机构地区：[1]State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,The Chinese Academy of Sciences [2]Graduate School of the Chinese Academy of Sciences

出　　处：《Chinese Journal of Structural Chemistry》2009年第12期1569-1574,共6页结构化学（英文）

基　　金：Supported by the NNSFC (20373073);the National Basic Research Program of China (No. 2007CB815307);the Funds of CAS (KJCX2-YW-H01);Fujian Key Laboratory of Nanomaterials (No. 2006L2005);the Knowledge Innovation Program of CAS

摘　　要：Solid-state reaction of praseodymium （III） oxide,K2CO3 and MoO3 at high temperature leads to a potassium lanthanide double molybdate,namely,KPr（MoO4）2. The structural and optical properties of the title compound have been investigated by means of single-crystal X-ray diffraction and spectroscopic measurements at room temperature. KPr（MoO4）2 crystallizes in tetragonal,space group I41/a with a = 5.401（3）,c = 12.044（10）,Z = 2 and R （I 〉 2σ（I）） = 0.0416. It features the famous scheelite-type structure （CaWO4）,which can be thought as the substitution of two Ca^2＋ ions in CaWO4 by a couple of K^＋ and Pr^3＋ ions in a statistical manner,and W^6＋ by Mo^6＋ cations.Solid-state reaction of praseodymium （III） oxide,K2CO3 and MoO3 at high temperature leads to a potassium lanthanide double molybdate,namely,KPr（MoO4）2. The structural and optical properties of the title compound have been investigated by means of single-crystal X-ray diffraction and spectroscopic measurements at room temperature. KPr（MoO4）2 crystallizes in tetragonal,space group I41/a with a = 5.401（3）,c = 12.044（10）,Z = 2 and R （I 〉 2σ（I）） = 0.0416. It features the famous scheelite-type structure （CaWO4）,which can be thought as the substitution of two Ca^2＋ ions in CaWO4 by a couple of K^＋ and Pr^3＋ ions in a statistical manner,and W^6＋ by Mo^6＋ cations.

关 键 词：solid-state reactions crystal growth crystal structure MOLYBDATES optical properties 

分 类 号：O611.2[理学—无机化学]