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| Hauyne from Kola Peninsula |
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Hauyne http://en.wikipedia.org Hauyne, haüyne or hauynite is a tectosilicate mineral with sulfate and chloride with formula: (Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2. It is a feldspathoid and a member of the sodalite group. Hauyne crystallizes in the isometric system forming translucent, vitreous typically twinned crystals with highly variable color (blue, white, grey, yellow, green, pink). It has a Mohs hardness of 5 to 6 and a specific gravity of 2.4 to 2.5. Hauyne was first described in 1807 from samples at Vesuvius Mount Somma, Italy. It was named for the French crystallographer, Rene Just Hauy (1743-1822). It occurs in silica deficient igneous rocks in a wide variety of locations. http://www.a-m.de Chemistry (Na,Ca)8-4[(SO4)2-1|(AlSiO4)6] Hardness 5 - 6 Lustre vitreous - greasy Colour blue, green, yellow, grey, colourless Streak white Density [g/cm3] 2.4 - 2.5 Crystal habit isometric, crystals mostly [110], twins [111] Cleavage, Fracture [110] distinct, fracture conchoidal to uneven other characteristics and occurrences mostly rounded grains, only in young undersaturated volcanic rocks http://www.findyourfate.com Overview: Hauyne gets its name from a well renowned French mineralogist, René Just Haüy (1743-1822), the discoverer of crystallography. Hauyne belongs to the Sodalite mineral group, which is composed of minerals with a similar isometric structure and related chemistry. It occurs in igneous and volcanic rocks. As it is quite rare and has beautiful color, Hauyne is highly priced. The mineral has been found in a typically beautiful electric blue as well as green, red, yellow, and gray colors. Usage: Hauyne facilitates deep meditation and can be used to journey back into past lives. Brings peacefulness and self-acceptance. Legend: It was discovered in 1807 on Mt Somma, among Vesuvian lavas, Italy by the French crystallographer, Mr. R. J. Hauyne (1743-1822), and was named after him. Occurrence: Mt Somma, Italy, Tasmania, Australia, Eifel, Schwarzwald, and Germany. |
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