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Mineralpedia Details for Gjerdingenite-Fe

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Gjerdingenite-Fe

Gjerdingenite-Fe

This is a one locality mineral, a member of the Labuntsovite supergroup. All members of this supergroup are titanium bearing with niobium to some degree. All are cyclosilicates, reflective of their prismatic habit. This particular specimen contains a tiny less than 1mm cluster of three or four yellowish crystals.

Formula
K2(H2O)2Fe(Nb,Ti)4(Si4O12)2(O,OH)4ยท4H2
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Lath, Aggregates 
Cleavage
None, None, None 
Luster
Vitreous - Waxy 
Color
pale yellow, yellow, yellow orange 
Streak
faint yellowish white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness
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Gjerdingenite-Fe from Gjerdingen, Nordmarka, Lunner, Oppland, Norway

Gjerdingenite-Fe
            from Gjerdingen, Nordmarka, Lunner, Oppland, Norway
Special Info
Type & Only Locality

This is a one locality mineral, a member of the Labuntsovite supergroup. All members of this supergroup are titanium bearing with niobium to some degree. All are cyclosilicates, reflective of their prismatic habit. This particular specimen contains a tiny less than 1mm cluster of three or four yellowish crystals. Thanks Knut!

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