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Formula: NdAl3(PO4)2(OH)6
Anhydrous phosphate, plumbogummite group,
alunite supergroup,
neodymium-bearing mineral
Crystal System: Trigonal
Specific gravity: 3.70 calculated
Hardness: 5 to 6
Streak: White
Colour: Moderate brown
Weakly RADIOACTIVE
Environments
Localities
At the type locality, the Sausalito Road Quarry, Sausalito, Marin County, California, USA, florencite-(Nd) occurs lining surfaces of
fractures in a weathered chert layer in shale.
Associated minerals include churchite-(Y),
todorokite, lithiophorite and
hematite
(HOM).
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