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Experimental and calculated X-ray powder diffraction data for cesium titanium silicate, CsTiSi2O6.5: A new zeolite

Published online by Cambridge University Press:  10 January 2013

David E. McCready ,
M. Lou Balmer  and
Keith D. Keefer
David E. McCready
Affiliation:
Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352
M. Lou Balmer
Affiliation:
Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352
Keith D. Keefer
Affiliation:
Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352
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Abstract

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.

Type
Research Article
Information
Powder Diffraction , Volume 12 , Issue 1 , March 1997 , pp. 40 - 46
Copyright
Copyright © Cambridge University Press 1997

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References

Balmer, M. L., and Bunker, B. C. (1995). “Inorganic Ion Exchange Evaluation and Design—Silicotitanate Ion Exchange Waste Conversion,” Report #PNL-10460, Pacific Northwest Laboratory Richland, WA 99352.CrossRefGoogle Scholar
Balmer, M. L., Huang, Q., Wong-Ng, W., Roth, R., Santoro, A. (1996a). “Neutron and X-ray Diffraction Study of the Crystal Structure of CsTiSi2O6.5,” submitted to J. Solid State Chem.CrossRefGoogle Scholar
Balmer, M. L., Wang, L. Q., Peden, C. H. F., and Bunker, B. C. (1996b). “Solid State 29Si MAS NMR Study of Silicotitanates,” submitted to Chem. Mater.Google Scholar
Beger, R. M. (1969). “The Crystal Structure and Chemical Composition of Pollucite,” Chem. Mater., Z. Kristallogr. 129, 280–302.Google Scholar
Hess, N. J., and Balmer, M. L. (1996). “Ti XAS of a Novel Cs-Ti-Silicate,” submitted to J. Solid State Chem.Google Scholar
Naray-Szabo, St. V. (1938). “Die Struktur des Pollucits CsAlSi2O6·xH2O,” Z. Kristallogr. 99, 277–282.CrossRefGoogle Scholar
Nel, H. J. (1944). “Pollucite from Karibib, South West Africa,” Am. Mineral. 29, 443–452.Google Scholar
Newnham, R. E. (1967). “Crystal Structure and Optical Properties of Pollucite,” Am. Mineral., Mineral. Notes 32, 1515–1518.Google Scholar
Powder Diffraction File PDF-2 Database (1995). PDF 15-317, 21-1272, 25-194, 29-407, JCPDS-ICDD.Google Scholar