Crystalline phases of Alf.sub.k (OH).sub.3-k and HAlF.sub.4
AssigneeE. I. Du Pont de Nemours and Company
InventorsDavid R. Corbin, Norman Herron, David L. Thorn
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Abstract
New crystalline phases of the fluoroaluminum compound AlF.sub.k (OH).sub.3-k and processes for their preparation and conversion to conventional phases, as well as isolation of solid HAlF.sub.4 are disclosed.
Claims4
A compound comprising AlF.sub.k (OH).sub.3-k having space group Fd3m wherein k is 2.2 to about 3 having a unit cell parameter a of from about 9.55 to about 9.75 .ANG. (0.955 to 0.975 nm) at 25.degree. C.
A compound comprising AlF.sub.3 having space group P4/nmm and unit cell parameters of a=10.18 .ANG. (1.018 nm) and c=7.17 .ANG. (0.717 nm).
A compound comprising HAlF.sub.4 in a solid phase up to about 300.degree. C.
Dependencies are inferred from the claim text.