Experimental and calculated X-ray powder diffraction data for cesium titanium silicate, CsTiSi2O6.5: A new zeolite
Experimental and calculated X-ray powder diffraction data for cesium titanium silicate, CsTiSi2O6.5: A new zeolite
复制标题
硅酸钛铯 CsTiSi2O6.5 的实验和计算 X 射线粉末衍射数据：一种新型沸石
作者：
D. Mccready;M. Balmer;K. Keefer
报道了一种新型合成沸石铯钛硅酸盐（CsTiSi2O6.5）的标准化实验和x射线粉末衍射计算数据。此外，在空间群i3d（230）中提出了CsTiSi2O6.5与矿物（CsAlSi2O6·xH2O）同构的结构模型。该结构模型是已报道的CsTiSi2O6.5的x射线粉末衍射计算数据的基础。CsTiSi2O6.5的实验模式表明，该化合物在体心立方（BCC）晶胞中结晶，a=13.8423 (1) Å。CsTiSi2O6.5的参考强度比（I/Ic）实测值为2.37，对比计算值为4.45。CsTiSi2O6.5的实验密度（Dm）为3.48±0.09 g/cm3，与计算密度（Dx） 3.42 g/cm3一致。原子吸收光谱法分析CsTiSi2O6.5的化学成分为54±2 wt% Cs；23±2 wt% Ti；23±2 wt% Si，与56 wt% Cs的理论组成比较有利；20 wt% Ti；24 wt% Si。
Standardized experimental and calculated X-ray powder diffraction data for a new synthetic zeolite, cesium titanium silicate, CsTiSi2O6.5, are reported. In addition, a structure model in space group Ia3d (230), which is isomorphous with the mineral pollucite (CsAlSi2O6·xH2O), is proposed for CsTiSi2O6.5. This structure model is the basis of the reported calculated X-ray powder diffraction data for CsTiSi2O6.5. The experimental pattern for CsTiSi2O6.5 shows this compound crystallizes in a body-centered cubic (BCC) unit cell with a=13.8423 (1) Å. The measured value of the reference intensity ratio (I/Ic) of CsTiSi2O6.5 is 2.37, while the contrasting calculated value of I/Ic is 4.45. The experimental density (Dm) of CsTiSi2O6.5 is 3.48±0.09 g/cm3, in agreement with the calculated density (Dx) of 3.42 g/cm3. Chemical analysis of CsTiSi2O6.5 by atomic absorption spectroscopy gives its composition as 54±2 wt% Cs; 23±2 wt% Ti; 23±2 wt% Si, which compares favorably with the theoretical composition of 56 wt% Cs; 20 wt% Ti; 24 wt% Si.