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Pachnolite with Thomsenolite

#PD42526

Pachnolite with Thomsenolite

#PD42526
Availability
Sold
Size
5.5 x 4 x 2.5 cm - Sm Cabinet 
Formula
NaCaAlF6·H2O (RRUFF)
Locality
Ivigtut Cryolite deposit, Ivigtut, Arsuk Fjord, Sermersooq, Greenland

This is kind of a teaser to the upcoming Ivigtut Special Edition. I have a few better than this, but this is a good specimen also with good 0.75-1mm Pachnolite crystals with pyramidal terminations and iron-stained. There are other areas which show waterclear Pachnolite crystals. There is also wider prismatic Thomsenolite crystals to 1mm and some of these have little epitaxial Pachnolite crystals growing on the tips. Overall a facsinating specimen.

Type Locality

Pachnolite

Formula
NaCaAlF6·H2
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Twinning Common, Pseudo Orthorhombic 
Cleavage
Poor, None, None 
Luster
Vitreous - Greasy 
Color
colorless, white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness

Data courtesy of Webmineral.

Collection
Phillips Collection
Special Info
Type Locality

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