LithoCat

MineralPlumbogummite
FormulaPbAl3(PO4)(PO3OH)(OH)6
Crystal FormTrigonal/Hexagonal Scalenohedral [3 2/m]
CleavageNone
ColorLight blue, Gray-white, Yellow-gray, Yellow, Yellow-brown, Red-brown, Greenish, Bluish, Dark blue-gray
Density4.0 – 4.1 g/cm3
DiaphaneityTranslucent
FractureIrregular/Uneven, Sub-Conchoidal
Hardness4.0 - 5.0
LustreResinous, Dull
StreakColorless to white
Type Loc.Huelgoat, Finistère, Brittany, France
Dana 8 Class42.7.3.5
Strunz Class7/B.36-70
Mindatmindat.org
WebMineralWebMineral
ID376