无机材料学报

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Fe2BP3O12的合成及晶体结构

陈昊鸿1; 葛明辉1,2; 杨昕昕1; 宓锦校2; 赵景泰1   

  1. 1. 中国科学院上海硅酸盐所高性能陶瓷和超微结构国家重点实验室灶具, 上海 200050; 2. 厦门大学化学化工学院, 厦门 361005
  • 收稿日期:2003-01-23 修回日期:2003-06-25 出版日期:2004-03-20 网络出版日期:2004-03-20

Synthesis and Crystal Structure of Fe2BP3O12

CHEN Hao-Hong1; GE Ming-Hui1,2; YANG Xin-Xin1; MI Jin-Xiao2; ZHAO Jing-Tai1   

  1. 1.State Key Laboratory of High Performance Ceramics & Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China; 2.College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005; China
  • Received:2003-01-23 Revised:2003-06-25 Published:2004-03-20 Online:2004-03-20

摘要: 采用固态反应方法合成了有序的铁基硼磷酸盐Fe2BP3O12,用X射线粉末衍射方法精修了其晶体结构,属三方晶系,空间群为P3,α=8.02703(6)°A,c=7.40168(9)°A,V=413.02(1)°A3,Dx=3.2758(1)(g/cm3),Z=2,对于55个参数,用188条衍射线及18001个衍射强度全谱数据点精修到R(Ⅰ)=6.35%,R(p)=15.36%,所对应的R(dbw)=10.12%.B原子具有三角形氧配位,P和Fe的氧配位分别是四面体和八面体.Fe的两配位八面体共面形成新结构单元,BO3三角形联接磷氧和铁氧多面体形成三维结构.对比同构的铬硼磷酸盐,此化合物期望具有类似的非线性光学及其它非线性物理性质.

关键词: 硼磷酸盐, 固态反应, 晶体结构, 粉末衍射

Abstract: Fe2BP3O12 was synthesized by high temperature solid state reactions. Its crystal
structure was refined by powder X-ray diffraction methods, belonging to trigonal system with space group P3, a=8.02703(6)A, c=7.40168(9)A,
V=413.02(1)A3, Dx=3.2758(1)(g/cm3), Z=2. The full profile refinement resulted to R(I)=6.35%, R(p)=15.36% and R(dbw)=10.12%
for 55 parameters using 188 reflections and 18001 profile data points. The structure contains [BP3O12]4- poly-anion, built by trigonal
planar BO3 sharing the three corner oxygen atom with three PO4 tetrahedra. And Fe2O9 bi-octahedra fused by two face-sharing FeO6 connect
with the poly-anions forming three dimensional ordered structure. Compared with its chromium isotypic compound, Cr2BP3O12, which shows NLO
property, the title compound may be a potential NLO material.

Key words: borophosphate, solid state synthesis, crystal structure, powder diffraction

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