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Creedite forms colorless to white to purple monoclinic prismatic crystals. It often occurs as acicular radiating sprays of fine prisms. Creedite was first described in 1916 from the Creed Quadrangle in Mineral Co., Colorado. It is a product of intensely oxidized ore deposits.
Ca3Al2SO4(F,OH)2H2O
Hydrated Calcium Aluminum Sulfate Hydroxide Fluoride
Class:
Colorless, white, purple,
White
Vitreous
Transparent
2.7
4
Perfect
Conchoidal
Short prismatic to acicular crystals, granular, massive
Non-fluorescent
Frequency:
Uncommon
Origin:
Hydrothermal, associated with fluorite and barite.

Occurrence:
Creede, Colorado, USA; Chihuahua, Mexico; Durango, Mexico; Akcha-tau, Kazakhstan
Application:
Mineral Specimens
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