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: State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter
• 出 处: 结构化学
• 发表日期: 2009年12期
• 关键词: tetragonal potassium spectroscopic manner substitution lanthanide refinement dif

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 Ca2+ ions in CaWO4 by a couple of K+ and Pr3+ ions in a statistical manner,and W6+ by Mo6+ 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- 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 of as the substitution of two Ca2 + ions in CaWO4 by a couple of K + and Pr3 + ions in a statistical manner, and W6 + by Mo6 + cations .