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Fluorite Introduction & Use

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Source:
2019/08/02 16:35
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Fluorite Introduction & Use

INTRODUCTION

Fluorite is known to be one of the famous fluorescent minerals. The word fluorescent has arrived from fluorite mineral. Fluorite crystallizes in a cubic design. The major reserves for fluorite is found in China which accounts for around 24 million tons in inner Jiangxi, Mongolia, Hunan, Zhejiang and Fujian provinces. These reserves make about 80% of the national total of fluorite reserves. As China has introduced many measures to protect the fluorite reserves, the output for fluoride has remained steady.

PHYSICAL CHARACTERISTICS

 

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Color is extremely variable and many times can be an intense purple, blue, green or yellow; also colorless, reddish orange, pink, white and brown. A single crystal can be multi-colored.

Luster is vitreous.

Transparency: Crystals are transparent to translucent.

Crystal System: Isometric; 4/m bar 3 2/m

Crystal Habits include the typical cube and to a lesser extent, the octahedron as well as combinations of these two and other rarer isometric habits. Always with equant crystals; less common are crusts and botryoidal forms. Twinning also produces penetration twins that look like two cubes grown together.

Cleavage is perfect in 4 directions forming octahedrons.

Fracture is irregular and brittle.

Hardness is 4

Specific Gravity is 3.1+ (average)

 

Streak is white.

 

FLUORITE USE

Fluorite has an attractive cleavage habits and the cleavage, which is perfect and parallel to octahedral faces, can be peeled off in some cases to make a smooth crystal perfect octahedron.

Fluorite generally has lapidary and ornamental uses. Fluorite can be drilled into jewelry, however it is not used as a semiprecious stone due to its relative softness.

In industries, fluorite is usually used in the production of certain glasses and enamels and used as flux for smelting.

Three different grades of fluorspar include acid, ceramic and metallurgical. The pure form of fluorite is used for manufacture of hydrofluoric acid, which acts as an intermediate source for most of the fine chemicals containing fluorine.

Transparent fluorite lenses have low dispersion and so lenses that are manufactured using them have low dispersion and they exhibit very less chromatic aberration. This property of fluorite mineral makes it important in telescopes and microscopes.