Citation: Hemon, A; Courbion, G (1990). The Na F - Ca F2 - Al F3 system: structures of $-beta- Na Ca Al F6 and Na4 Ca4 Al7 F33. Journal of Solid State Chemistry, 84, pp. 153-164.
Formula: Al7 Ca4 F33 Na4.032
Chemical name:Sodium calcium aluminium fluoride (4.03/4/7/33)