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fluorite

fluorite

fluorite Sentence Examples

  • The refractive indices of all glasses at present available lie between 1.46 and 1 90, whereas transparent minerals are known having refractive indices lying considerably outside these limits; at least one of these, fluorite (calcium fluoride), is actually used by opticians in the construction of certain lenses, so that probably progress is to be looked for in a considerable widening of the limits of available optical materials; possibly such progress may lie in the direction of the artificial production of large mineral crystals.

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  • FLUOR-SPAR, native calcium fluoride (CaF 2), known also as Fluorite or simply Fluor.

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  • The high level of fluorescence of fluorite from this classic area, adds an extra cachet other locations do not have.

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  • Its newly designed optical system consists of 17 elements in 13 groups, including one fluorite and two UD lenses.

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  • purple minerals The most common purple minerals are amethyst, a variety of quartz, and purple fluorite.

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  • But the green fluorite on the right has more obvious cubes.

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  • A Victorian lead mine once home to large, but colorless octahedral fluorite.

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  • fluorite crystal.

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  • fluorite lens and two UD lenses.

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  • fluorite objectives.

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  • fluorite structure is that it can sustain a high degree of substitution.

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  • fluorite element and two UD-glass elements to obtain high resolution and high contrast.

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  • fluorite glass for the virtual elimination of false color.

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  • The fluoride in toothpastes is a chemical made from the mineral fluorite.

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  • The refractive indices of all glasses at present available lie between 1.46 and 1 90, whereas transparent minerals are known having refractive indices lying considerably outside these limits; at least one of these, fluorite (calcium fluoride), is actually used by opticians in the construction of certain lenses, so that probably progress is to be looked for in a considerable widening of the limits of available optical materials; possibly such progress may lie in the direction of the artificial production of large mineral crystals.

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  • FLUOR-SPAR, native calcium fluoride (CaF 2), known also as Fluorite or simply Fluor.

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