LithoCat

MineralAllanite-(Ce)
Formula{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Crystal FormMonoclinic/Prismatic [2/m]
CleavageImperfect on {001} ; Poor on {100} and {110}
ColorBrown to Black
Density3.5 – 4.2 g/cm3
DiaphaneityTranslucent, Opaque
FractureIrregular/Uneven, Conchoidal
Hardness5.5 - 6.0
LustreVitreous, Resinous
StreakBrown, Greyish
Type Loc.Qáqarssuatsiaq, Aluk Isl., Kap Farvel, Kujalleq, Greenland
Dana 8 Class58.2.1a.1
Strunz Class8/C.23-80
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WebMineralWebMineral
ID409