Mineral description : Trolleite

Green trolleite with dark blue scorzalite, brown rutile and light blue kyanit in quartz.
From Hålsjöberg.

Mineral class Phosphates : Wavellite - Lazulite group
Chemical formula Al4(PO4)3(OH)3
Crystal system Monoclinic
Habitus Lamellar to massive.
Cleavage Indistinct, fracture conchoidal.
Hardness 5.5 - 6
Density 3.09
Color Pale green to pale blue.
Streak White
Luster Vitreous, translucent.
Description A rare phosphate only used as mineral specimen.
Occurance  
Associates Trolleite, berlinite, rutil, kyanite.
Notes Type locality : Västanå mine, Sweden.
Named after H.G. Trolle-Wachtmeister.
Discovered in 1868 by Blomstrand.
References : 
   American Mineralogist, volume 050, pp. 267(1965)
   American Mineralogist, volume 059, pp. 974-984(1974)
   GFF 112, pg 9
   KVA Öfv 25(1866), pg 375
Localities A rare mineral in scandinavia.
Sweden :
  • Västanå, Bromölla, Skåne. Together with berlinite and other phosphates.
  • Hålsjöberg, Torsby, Värmland. As light green aggregates with rutile and kyanite.
  • Hökensås, Tidaholm, Västra Götaland.
Norway : No localities known

Finland : No localities known

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Last changed : 2001-01-23