Ammonium nickel sulfate crystals
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United States of America Patent
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Sep 17, 2002
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app pub date -
Jan 20, 2000
filing date -
Jan 20, 2000
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Abstract
Single crystals of (NH.sub.4).sub.2 Ni(SO.sub.4).sub.2.6H.sub.2 O represent an excellent material for filtering UV light and in an enclosed system will not deteriorate at temperatures as high as 125.degree. C. They are particularly useful in solar-blind optical systems and sensing devices, which seek to identify the presence of UV light sources in the UV missile warning band.
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