New representative in the sodalite structure type with extraframework anions [AlF{sub 6}]{sup 3-}
- Russian Academy of Sciences, Institute of Experimental Mineralogy (Russian Federation)
- Moscow State University (Russian Federation)
The crystal structure of new synthetic aluminosilicate |Na{sub 7.38}(AlF{sub 6}){sub 0.70}(H{sub 2}O){sub 4.88}| [(Si{sub 6.74}Al{sub 5.26})O{sub 24}]-SOD, which was obtained by hydrothermal synthesis (T = 650 Degree-Sign C, P = 2 Kbar) in the Si-Al-Na-F-H{sub 2}O system, has been found by X-ray diffraction (Xcalibur-S-CCD diffractometer, 2{theta}{sub max} = 64.99 Degree-Sign , R = 0.037 for 440 reflections): a = 9.0461(1) Angstrom-Sign , sp. gr. P 4 bar 3m, Z = 1, and {rho}{sub calcd} = 2.370 g/cm{sup 3}. The disordered Si,Al-tetrahedral framework (the structural basis of the new compound) is topologically identical to the framework of mineral sodalite. Na{sup +} cations, [AlF{sub 6}]{sup 3-} anions, and H{sub 2}O molecules occupy framework voids. The form of fluorine incorporation into the sodalite crystal structure (as octahedral aluminofluoride complexes) has been reliably established for the first time.
- OSTI ID:
- 22054312
- Journal Information:
- Crystallography Reports, Vol. 56, Issue 2; Other Information: Copyright (c) 2011 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
- Country of Publication:
- United States
- Language:
- English
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