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Plumbogummite

Type Locality
Huelgoat (Locmaria-Berrien), Finistère, Brittany, France
Mineral Data
PbAl3(PO4)2(OH)5·H2O
Strunz: 
8.BL.10
Physical Properties
Hardness: 
4.0 - 5.0
Tenacity: 
brittle