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Arrojadite

#BN52292

Arrojadite

#BN52292
Availability
Sold
Size
3.5 x 2 x 1 cm - Miniature 
Formula
KNa3(CaNa2)Fe2+13Al(PO4)11(PO3OH)(OH)2 (RRUFF)
Locality
Big Fish River, Dawson dist., Yukon Territory, Canada
Tagged
phosphate

Really not too sure which Arrojaite this is, but likely it is Arrojadite-(KNa). It is dark olive green, translucent with sub-parallel tabular crystals stacked with roof-like terminations.  Either which way the crystals are excellent and are not found in pegmatites like well crystallized. It is rather, a black shale phosphate.

Arrojadite

Formula
KNa4CaMn++4Fe++10Al(PO4)12(OH,F)2 
Crystal System
Monoclinic 
Cleavage
Distinct, None, None 
Luster
Vitreous - Greasy 
Color
olive green, clove brown, yellow 
Streak
green gray 
Class
Monoclinic - Domatic 
Fracture
Conchoidal - Uneven 
Hardness

Data courtesy of Webmineral.

Collection
Dr. Buford Nichols Collection

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