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Keckite

#23385

Keckite

#23385
Availability
Sold
Size
1.5 x 1 x 1 cm - Thumbnail 
Formula
CaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3·7H2O (RRUFF)
Locality
Hagendorf-Süd, Oberpfälzer Wald, Bavaria, Germany
Tagged
phosphate , pegmatite mineral

Deep reddish brown clusters of Keckite, less than 0.75mm. This specimen is from Erich Keck himself. Looking at these really closely, striated crystals of possible Jahnsite are seen and the note on Mindat makes me think these are not Keckite, but Jahnsite!

Keckite

Formula
CaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3·7H2
Crystal System
Monoclinic 
Crystal Habit
Fan Shaped 
Cleavage
Poor, Indistinct, None 
Luster
Earthy (Dull) 
Color
brown, gray brown, yellow brown 
Streak
yellow white 
Class
Monoclinic - Prismatic 
Fracture
Flexible 
Hardness
4.5 

Data courtesy of Webmineral.

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