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US 5,312,612 AGranted
Polymorphous luminescent compositions
AssigneeGeneral Electric Company
InventorsAlok M. Srivastava, John F. Ackerman
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Abstract
Polymorphous phosphorescent compounds of the formula MNbOF.sub.5, wherein M is at least one of barium, strontium, lead and calcium, are prepared by the reaction of the appropriate metal oxide or fluoride with niobium(V) oxide in aqueous hydrofluoric acid.
Claims5
A luminescent crystalline compound having the formula MNbOF.sub.5, wherein M is at least one of strontium and lead.
Dependencies are inferred from the claim text.