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A comment on Fluorite lenses: Corrective capabilities beyond ordinary optical glass. Parent comment

Re:Fluorite lenses: Corrective capabilities beyond ordinary ... by lambdasquirrel on Tuesday January 16, 2024 @06:54PM (#39020954)
I thought the reason underlying that is that fluorite is not a glass, technically. It is a crystal. But I’m not a MatSci person so that doesn’t leave me any bit more informed.
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