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Fluorine (or fluorite)
Halogen group
Formule chimique :
CaF2
Système cristallin :
Cubic
Etymologie :
From the Latin word fluor, which means "to flow" and from its chemical composition, which is rich in fluorine.
Dureté :
4
Densité :
3.2
Propriétés physiques :
Glassy sheen. Wide range of colours. Transparent. Blue or violet fluorescence under long UV light. 4 perfect cleavage planes according to the octahedron.
Propriétés chimiques :
Insoluble in acids.
Formule chimique :
CaF2
Habitus :
Fluorite crystals are generally derived from the cubic form (from cube to octahedron). It can also be massive
Gîtologie :
Fluorite is a ubiquitous mineral in hydrothermal veins. It can also be found in some pegmatites and sedimentary rocks.
Determination :
Easy because of its shape derived from the cube and its 4 perfect cleavage planes.
Utilisation :
Fluorite ore
Fluorite (a very common mineral) can be found in many regions of the world as well as in France where many deposits are known (Le Beix in Puy-de-dôme, Langeac in Haute-Loire, Le Burc in Aveyron…).
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