Creedite

<p>Creedite is a <a href="/facts/Calcium/hf252CC0">calcium</a> <a href="/facts/Aluminium/7wmR8jYE">aluminium</a> <a href="/facts/Sulfate/yuWVxsUf">sulfate</a> <a href="/facts/Fluoride/LpqNMzwa">fluoro</a> <a href="/facts/Hydroxide/zW0wxpWD">hydroxide</a> <a href="/facts/Mineral/LkUFbNmv">mineral</a> with formula: Ca3Al2SO4(F,OH)10·2(H2O). Creedite forms colorless to white to purple <a href="/facts/Monoclinic/5PCwXvzX">monoclinic</a> prismatic crystals. It often occurs as acicular radiating sprays of fine prisms. It is translucent to transparent with <a href="/facts/Index_of_refraction/yjkzvgeE">indices of refraction</a> of nα = 1.461 nβ = 1.478 nγ = 1.485. It has a <a href="/facts/Mohs_hardness/wXBMcVIm">Mohs hardness</a> of 3.5 to 4 and a <a href="/facts/Specific_gravity/ySquGd2x">specific gravity</a> of 2.7.
</p><p>Creedite was first described in 1916 from the Creede Quadrangle in <a href="/facts/Mineral_County,_Colorado/bdJtjquy">Mineral County, Colorado</a>. It is a product of intense <a href="/facts/Oxidation/Pyd5RVcj">oxidation</a> of <a href="/facts/Ore/kgc9DssX">ore</a> deposits.
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Creedite open-in-new

Creedite