摘要
利用X射线粉晶衍射仪对纯萤石矿物进行全谱扫描,在确定萤石矿物衍射5强峰基础上,准确标出萤石5强峰相应的d值,按2θ角值由大到小的顺序排成纵行,计算出不同d值的1/d2值,用1/d2值最小一条线的值去除其余各条线的1/d2值,得出的数值D仍依次排列;据D值小数部分是0.36或0.68数值,推断实验所测萤石低角度的第一条线是{111}网面衍射产生的,其相应的h2+k2+l2值为3,以第一条线h2+k2+l2值3分别乘以其余各条线的D值,得出的数据h2+k2+l2值仍依次排列,分别为8.04,11.04,16.08和19.08,由于测量的误差,舍去小数点后数据,保留整数位,即可得到相应的h2+k2+l2值3、8、11、16和19,据h2+k2+l2值查出相应网面指数为{111}、{220}、{311}、{400}和{331},根据晶胞参数公式:a=d(hkl)(h2+k2+l2)1/2计算出萤石晶胞参数值为0.546 nm。
The pure fluorites were full spectrum scanned by the X-ray powder diffractometer. On the basis of top 5 strong diffraction peaks of the fluorites, the values of the peaks can be accurately marked. The values of the an- gle 20 were arranged in descending longitudinal, which could calculate the 1 / d2 values of different d values. The value of the minimum line of the 1 / d%alue divided by the 1 / d2 values of the remaining lines, with the result val- ue D still lining; According to the decimal part of D value is 0.36 or 0.68, it＇s deduced that the first line of the flu- orite low angle is surface { 111 } diffraction, and its corresponding h^2 ＋ k^2 ＋ I^2 value is 3. The value 3 of the first line h^2 ＋ k^2 ＋ I^2 multiplied by D values of the remaining lines respectively. The results of h^2 ＋ k^2 ＋ I^2 values were still lined, such as 8.04, 11.04, 16.08 and 19.08. Due to the error of measuring, abandoning the data after the deci- mal point, keeping integer bits, it can be obtained the corresponding h^2 ＋ k^2 ＋ I^2 values, as 3, 8, 11, 16 and 19. According to h^2 ＋ k^2 ＋ I^2 values, it could be obtained the corresponding net surface index, as { 111 }, {220}, {311 }, {400} and {331}. According to the crystal cell parameters formula： a = d （hkl） （h^2 ＋ k^2 ＋ I^2） 1/2, it could be calculat- ed the value of crystal cell parameters, 0.546 nm.
出处
《地质调查与研究》
2014年第1期77-80,共4页
Geological Survey and Research
基金
国土资源部"变质岩岩石矿物鉴定检测技术方法研究"项目(201011029-3)
关键词
X射线衍射
萤石衍射图谱
指标化
晶胞参数
X-ray diffraction
fluorite diffraction pattern
index
cell parameters
