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Mineralpedia Details for Noelbensonite

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Noelbensonite

Noelbensonite

Named after geologist William Noel Benson. Found at the type locality in the Woods mine in New South Wales, Australia as a replacement for namansilite and pecolite. Additional localities include in the Cherchiara mine in Luguria, Italy, and in the Sanbagawa belt on Shikoku Island, and Shimoharai mine in the Kyushu region of Japan. Noelbensonite appears as dark brown aggregates of blocky to lamellar crystals, and as monomineral veinlets.

Ref. Minerals and their Localities, Bernard, J.H. and Hyršl, J. (2004)

IMA/CNMNC List of Mineral Names (2009) and Mineralogical Magazine 60 (1996), 369

Formula
BaMn3+2Si2O7(OH)2┬ĚH2
Crystal System
Orthorhombic 
Crystal Habit
Blocky, Cryptocrystalline, Crystalline - Fine 
Cleavage
None, None, None 
Luster
Vitreous - Greasy 
Color
dark brown 
Streak
yellow brown 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness
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Noelbensonite from Cerchiara mine, Borghetto di Vara, La Spezia, Liguria, Italy

Noelbensonite
            from Cerchiara mine, Borghetto di Vara, La Spezia, Liguria, Italy

From an ancient iron mine, this specimen occurs as an earthy, apricot brown, fine grained mineral in veinlets probably replacig Namansilite.

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