Title: Ammonium Hexafluoroaluminate
CAS Registry Number: 7784-19-2
CAS Name: Triammonium hexafluoroaluminate(3-)
Additional Names: ammonium cryolite; ammonium aluminum fluoride; ammonium fluoaluminate
Molecular Formula: AlF6H12N3
Molecular Weight: 195.09
Percent Composition: Al 13.83%, F 58.43%, H 6.20%, N 21.54%
Line Formula: (NH4)3AlF6
Literature References: Prepn from ammonium fluoride and aluminum hydroxide: v. Helmolt, Z. Anorg. Allg. Chem. 3, 127 (1893); Petersen, J. Prakt. Chem. [2] 40, 55 (1889); Kwasnik in Handbook of Preparative Inorganic Chemistry vol. 1, G. Brauer, Ed. (Academic Press, New York, 2nd ed. 1963) p 236.
Properties: Cubic crystals, d 1.78. Thermally stable to above 100°. Freely sol in water. Does not attack glass.
Density: d 1.78
Use: Prepn of pure aluminum fluoride. |