New representative in the sodalite structure type with extraframework anions [AlF{sub 6}]{sup 3-}

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774511020192· OSTI ID:22054312

Kotel'nikov, A R ^[1]; Shchekina, T I; Gramenitskiy, E N ^[2]; Zubkov, E S ^[1]

---

1. Russian Academy of Sciences, Institute of Experimental Mineralogy (Russian Federation)
2. 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

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM COMPLEXES
ALUMINIUM FLUORIDES
ANIONS
CATIONS
CRYSTAL STRUCTURE
HYDROTHERMAL SYNTHESIS
REFLECTION
SODIUM IONS
VOIDS
X-RAY DIFFRACTION