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Mineralpedia Details for Labuntsovite-Mn

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Labuntsovite-Mn

Labuntsovite-Mn

The original Labuntsovite of the Labuntsovite Group, and now designated at the manganese dominant analogue of Labuntsovite, this mineral was named for Russian mineralogists Aleksander Labuntsov and Ekaterina Labuntsov-Kostyleva. Found in several Russia localities including in the co-type localities at the Yum’egor Pass in the Khibiny Massif, where it occurs as an alteration product of murmanite in alkaline rocks, and at Kuftn’yun Mountain in the Lovozero massif. Additional localities include at Magnet Cove in Arkansas, USA, and as crystals in cavities in igneous breccias at Mont Saint-Hilaire in Quebec, Canada. Occurs as orange to brown-orange prismatic crystals and radiating clusters.

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

IMA/CNMNC List of Mineral Names (2009) and Handbook of Mineralogy (Anthony et al.), 2 (1995), 444

Formula
Na4K4Mn2+2Ti8O4(Si4O12)4(OH)4ยท10-12H2
Crystal System
Monoclinic 
Crystal Habit
Prismatic 
Cleavage
Perfect, None, None 
Luster
Greasy (Oily) 
Color
brownish yellow, pink, reddish brown 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Subconchoidal 
Hardness
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Labuntsovite-Mn from Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada

Labuntsovite-Mn
            from Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada

Orange prismatic Labuntsovite crystals to 1mm in small 6mm vug in matrix.

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Labuntsovite-Mn from Mont Saint-Hilaire, Rouville Co., Quebec, Canada

Labuntsovite-Mn
            from Mont Saint-Hilaire, Rouville Co., Quebec, Canada

Orange prismatic and acicular crystals, the largest is 2mm in vuggy igneous breccia

Click thumbnail images for larger view.

Labuntsovite-Mn from Flora Mt., Lovozero Massif, Kola Peninsula, Russia

Labuntsovite-Mn
            from Flora Mt., Lovozero Massif, Kola Peninsula, Russia

Yellowish, somewhat glassy, short prismatic crystals to 0.75 lining open vug.


Click thumbnail images for larger view.

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