Crystals for ultraviolet light filters

Single-crystal – oriented-crystal – and epitaxy growth processes; – Processes of growth from solid or gel state – Using heat

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117 74, 117940, 117 68, C30B 700, C30B 2912

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active

058370544

ABSTRACT:
Crystals formed of a solid-solution of NiSiF.sub.6 6H.sub.2 O provide very good materials for filtering ultraviolet light and will not deteriorate in temperatures as high as 115.degree. C. They are particularly useful in sensing devices which seek to identify the presence of ultraviolet light in the UV missile warning band.

REFERENCES:
"Crystal Structure of the Fluosilicate Hexahydrate of Cobalt, Nickel and Zinc." from Acta Crystallogr. Sect. B (1973), 29 (Pt. 12) pp. 2741-2747 by Ray Siddhartha, 1973.
"Low temperature Optical Absorption of Nickel Fluosilicate Crystals" by M. H. L. Pryce, G. Agnetta, T. Carofano, M. B. Palma-Vittorelli and M. U. Palma, Phil. Mag., 10, 477-496 (1964).

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