Narsarsukite - Encyclopedia
Class : Silcates
Subclass : Inosilicates
Crystal system : Tetragonal
Chemistry : Na2(Ti,Fe)Si4(O,F)11
Rarity : Rare
Narsarsukite is a rare silicate of sodium and titanium found only in alkaline rock masses, mainly nepheline syenites and carbonatites, associated with other sodium silicates such as aegyrine, nepheline or sodalite (environments deficient in silica). It owes its name to its locality of discovery, Narssarssuaq near Julianehaab in Greenland. It is a rare mineral, forming tabular to prismatic crystals of varying color, with a predominance of yellow-brown and dark green, although it may appear unusually colorless or white. It is a rare mineral that has no particular use and is little known to mineral collectors.
Narsarsujite in the World
Narsarsukite in France
This mineral is not known in the French underground.
Twinning
Narsarsukite has no twinned crystals known.
Fakes and scams
No fake inventories for this mineral species
Hardness : 7
Density : 2.641 to 2.706
Fracture : Irregular to sub-conchoidal
Trace : White
TP : Translucent to transparent
RI : 1.609 to 1.630
Birefringence : 0,021
Optical character : Uniaxial +
Pleochroism : Weak
Fluorescence : None
Solubility : Hydrofluoric acid
Magnetism : None
Radioactivity : None