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Mineralpedia Details for Ajoite

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Ajoite

Ajoite

Named after the type locality at the New Cornelia mine, also called the Ajo mine, in Ajo, Arizona, USA. Ajoite is a rare mineral that occurs in additional USA localities, as well as in Mexico, South Africa, Namibia, Austria, Romania, Germany, and Japan. It is found “in oxidized copper-rich base metal deposits” in association with shattuckite, conichalcite, quartz, muscovite, pyrite, creaseyite, fluorite, duhamelite, sillenite, and papagoite.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/ajoite.pdf

Formula
Na3Cu2+20Al3Si29O76(OH)16ยท8H2
Crystal System
Triclinic 
Crystal Habit
Massive, Lath, Platy 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
blue green 
Streak
greenish white 
Class
Triclinic - Pinacoidal 
Hardness
WebMineral
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Mindat
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Ajoite from New Cornelia mine, Ajo Dist., Pima Co., Arizona, United States

Ajoite
            from New Cornelia mine, Ajo Dist., Pima Co., Arizona, United States

Aqua bluish green, silky, platy crystals to 0.3mm in vuggy matrix.

Bluish green, platy micro crystals to 1mm, free-standing in open cavities.

Click thumbnail images for larger view.

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