Hauyne

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.

Additional recommended knowledge

Essential Laboratory Skills Guide

Correct Test Weight Handling Guide: 12 Practical Tips

Safe Weighing Range Ensures Accurate Results

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.

References

• Mindat with location list
• Webmineral