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Simpsonite in Albite with Microlite

#DL63804
SOLD
Simpsonite from Tanco pegmatite, Bernic Lake, Manitoba, Canada - DL63804
Simpsonite from Tanco pegmatite, Bernic Lake, Manitoba, Canada - DL63804

Simpsonite in Albite with Microlite

#DL63804
Availability
Sold
Size
13 x 11 x 3.5 cm - Cabinet 
Formula
Al4Ta3O13(OH) (RRUFF)
Locality
Tanco pegmatite, Bernic Lake, Manitoba, Canada
Tagged
pegmatite mineral , tantalum

Banded Aplite composed of reddish grains of Microlite, Albite and Simpsonite. The Simpsonite glows bright blue under SW FL.  Illustrated on page 74, Fig. 4-18g.

Illustrated in London's book "Pegmatites"

Simpsonite

Formula
Al4Ta3O13(OH) 
Crystal System
Trigonal 
Crystal Habit
Euhedral Crystals, Prismatic, Striated 
Cleavage
None, None, None 
Luster
Vitreous - Adamantine 
Color
brownish yellow, colorless, white, light brown, light yellow 
Streak
white 
Class
Trigonal - Pyramidal 
Fracture
Brittle - Conchoidal 
Hardness
7-7.5 

Data courtesy of Webmineral.

Collection
Dr. David London Collection
Special Info
Illustrated in London's book "Pegmatites"
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