Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-23T05:32:49.347Z Has data issue: false hasContentIssue false
  • English
  • Français

Improved powder diffraction patterns for synthetic paranatisite and natisite

Published online by Cambridge University Press:  05 March 2012

S. Ferdov ,
V. Kostov-Kytin  and
O. Petrov
S. Ferdov
Affiliation:
Central Laboratory of Mineralogy and Crystallography, Bulg. Acad. Sci., bl. 107, Academic G. Bonchev Str., No. 2, 1113 Sofia, Bulgaria
V. Kostov-Kytin
Affiliation:
Central Laboratory of Mineralogy and Crystallography, Bulg. Acad. Sci., bl. 107, Academic G. Bonchev Str., No. 2, 1113 Sofia, Bulgaria
O. Petrov*
Affiliation:
Central Laboratory of Mineralogy and Crystallography, Bulg. Acad. Sci., bl. 107, Academic G. Bonchev Str., No. 2, 1113 Sofia, Bulgaria
*
a)Telephone: (+3592) 9797055; Fax: 1 (+3592) 9797056. Electronic mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Synthetic analogues of the minerals natisite and for the first time of paranatisite were prepared hydrothermally at 200 °C in the system Na2O–TiO2–SiO2–H2O. The obtained powder x-ray diffraction (XRD) patterns were interpreted by the Powder Data Interpretation (PDI) software package. As a result improved indexing and unit cell parameters refinements of these two phases were achieved. Synthetic natisite is tetragonal, space group—P4/nmm, a=0.649 67(8) nm, c=0.508 45(11) nm, V=0.214 50(10) nm3, Z=2, Dcal=3.13 g.cm−1, F30=37.48, M20=52.79. Synthetic paranatisite is orthorhombic, space group—Pmma, a=0.983 86(29) nm, b=0.919 23(19) nm, c=0.481 84(12) nm, V=0.435 78(19) nm3, Z=1, Dcal=3.01 g.cm−1, F30=16.42, M20=29.21.

Keywords

hydrothermal synthesisnatisiteparanatisiteindexing
Type
New Diffraction Data
Information
Powder Diffraction , Volume 17 , Issue 3 , September 2002 , pp. 234 - 237
Copyright
Copyright © Cambridge University Press 2002

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Dadachov, M. S.and Le Bail, A. (1997). “Structure of zeolite K2TiSi3O9.H2O determined ab initio from powder diffraction data,” Eur. J. Solid State Inorg. Chem. EJSCE5 34, 381–390. ess, EJSCE5 Google Scholar
Khomyakov, A. P., Polezhaeva, L. I., and Sokolova, E. V. (1992). “Paranatisite Na2TiSiO5—a new mineral,” Zap. Vseross. Mineral. O-vaZZZZZZ 121, 133–137.Google Scholar
Kostov-Kytin, V.and Ferdov, S. (2001). “Investigations in the system Na2O–K2O–TiO2–SiO2–H2O,” Compt. Rend. Acad. Bulg. Sci.ZZZZZZ 54, No.1, 51–54.Google Scholar
Kostov-Kytin, V., Ferdov, S., and Petrov, O. (2002). “Hydrothermal synthesis and successive transformation of paranatisite into natisite,” Compt. Rend. Acad. Bulg. Sci.ZZZZZZ 55, No.2, 61–64.Google Scholar
Kraus, W. and Nolze, G. (1999). POWDERCELL for WINDOWS V.23, Federal Institute for Materials Research and Testing, Rudower Chausse 5, 12849, Berlin, Germany.Google Scholar
Krumm, S. (1994). “WINFIT1.0—A computer program for x-ray diffraction line profile analysis,” XIII Conference on Clay Mineralogy and Petrology, Acta Universitatis Carolinae Geologica ZZZZZZ 38, 253–261.Google Scholar
Macicek, J. (1998). PDI: A powder data interpretation Package, Internal report of the Institute of Applied Mineralogy, Sofia, p. 36 (in Bulgarian).Google Scholar
Men’shikov, Yu., Pahomovski, Ya. A., Goiko, E. A., Bussen, I. V., and Mer’kov, A. N. (1975). “Natural tetragonal sodium titanosilicate–natisite,” Zap. Vseross. Mineral. O-vaZVMOAG 104, 314–317. 5bj, ZVMOAG Google Scholar
Nikitin, A. V., Ilyukhin, V. V., Litvin, B. N., Melnikov, O. K., and Belov, N. B. (1964). “Crystal structure of the synthetic sodium titanosilicate Na2(TiO)[SiO4],” Dokl. Akad. Nauk SSSR DANKAS 157, 1355–1357. dan, DANKAS Google Scholar
Nyman, H., O’Keeffe, M., and Bovin, J. O. (1978). “Sodium titanium silicate, Na2TiSiO5,” Acta Crystallogr., Sect. B: Struct. Crystallogr. Cryst. Chem. ACBCAR 34, 905–906. acb, ACBCAR CrossRefGoogle Scholar
Rocha, J. and Anderson, M. W. (2000). “Microporous titanosilicates and other novel mixed octahedral-tetrahedral framework oxides,” Eur. J. Inorg. Chem. 801–818.3.0.CO;2-E>CrossRefGoogle Scholar
Sokolova, E. B., Yamnova, A. N., Egorov-Tismenko, Yu. K., and Khomyakov, A. P. (1985). “Crystal structure of the new mineral Na8Ti3.5O2(OH)2[SiO4]4—polymorphic modification of natisite,” Sov. Phys. Dokl. SPHDA9 9, 1136–1142. sph, SPHDA9 Google Scholar