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Earth lab datasite

Plumbogummite
Phosphate encrusting pyromorphite
hydrous lead aluminium phosphate
Pb Al3 (PO4)2 (OH)5 ?
Scale bar = 1 centimetre
cleavage: Very poor prismatic
crystal system: Hexagonal
hardness 3.5 - 4.0
relative density 6.5 - 7.1
Roughton gill, Caldbeck Fells, Cumberland
26 E 7