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Mineralpedia Details for Barahonaite-(Al)

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Barahonaite-(Al)

Barahonaite-(Al)

Named for the relationship to barahonaite-Fe which in turn was named after Antonio Barahona from Spain who was the first to provide specimens for study, and for the aluminum content of the mineral. It is found as a secondary mineral in an oxidized sulfide deposit in association with arsenocrandallite, arsenogoyazite, conichalcite, cobaltarthurite, chlorargyrite, olivenite, azurite, cornwallite, pharmacosiderite, zalesiite, and lavendulan. Localities include at the Dolores prospect near Pastrana in the Murcia province of Spain which is its type locality, and in Chile and the United States.

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

Formula
(Ca,Cu,Na,Fe3+,Al)12Al2(AsO4)8(OH,Cl)x┬ĚnH2
Crystal System
Monoclinic 
Crystal Habit
Tabular 
Luster
Vitreous (Glassy) 
Color
pale blue 
Streak
white 
Class
Monoclinic 
Fracture
Brittle 
Hardness
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Barahonaite-(Al) from Maria Catalina Mine, Pampa Larga dist., Copiapó Province, Atacama Prov., Chile

Barahonaite-(Al)
            from Maria Catalina Mine, Pampa Larga dist., Copiapó Province, Atacama Prov., Chile

Pearly, light green rosettes to about 0.5mm associated with white, cubic Alumopharmacosiderite crystals.

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Barahonaite-(Al) from Dolores prospect, Pastrana, Mazarrón-Águilas, Murcia, Spain

Barahonaite-(Al)
            from Dolores prospect, Pastrana, Mazarrón-Águilas, Murcia, Spain

Light blue extremely micro platy crystals in tiny aggregates to about 0.5mm associated with snow white spherules of Arsenogoyazite and bright green Conichalcite.

Click thumbnail images for larger view.

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