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0 item @ $0.00  

Whitlockite

#50546

Whitlockite

#50546
Availability
Sold
Size
6 x 7 x 2.5 cm - Sm Cabinet 
Formula
Ca9Mg(PO4)6(PO3OH) (RRUFF)
Locality
Palermo mine, Groton, Grafton Co., New Hampshire, United States
Tagged
phosphate , pegmatite mineral

This specimen is from the Dr. David London collection and carries his personal label. It is basically a pod of advanced alteration of Triphylite, which was reduced to Siderite. Whitlockite was later deposited in the voids. The Whitlockite crystals to 1.5mm are colorless and show multiple rhombic faces. 

Whitlockite

Formula
Ca9Mg(PO4)6(PO3OH) 
Crystal System
Trigonal 
Crystal Habit
Rhombohedral Crystals, Tabular, Pistolitic 
Cleavage
None, None, None 
Luster
Vitreous - Resinous 
Color
colorless, gray, gray white, yellowish, white 
Streak
white 
Class
Trigonal - Ditrigonal Pyramidal 
Fracture
Brittle - Uneven 
Hardness

Data courtesy of Webmineral.

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