新化合物Sr_6CrNb_9O_(30)的合成及其结晶化学研究

Synthesis and Crystallochemistry Study on the New Compound Sr_6CrNb_9O_(30)

在 Sr O- Nb2 O5- Cr2 O3 三元系统中 ,首次合成了新化合物 Sr6Cr Nb9O3 0 ,通过光学显微镜、化学分析、透射电镜、电子探针、X- ray衍射等手段对该化合物进行了研究 ,得到了晶体粉晶衍射数据 ,晶胞参数 a=b=1.75 0 8nm,c=0 .7748nm,晶体属正交晶系 ,空间群为 Cmm2 。

A new compounds Sr6CrNb9O30 was prepared for the first time. SrO-Nb2O5-Cr2O5 ternary system; and studied by optical microscope, chemical analysis, SEM, EPMA and X-ray diffraction analyses. The XRD data of the compound was obtained. Sr6CrNb9O30 crystallizes the orthorhombic system with unit cell parameter a=b=0.175 08 nm, c=0.774 8 nm, space group Cmm2 and with tungsten bronze superstructure.