mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
0 item @ $0.00  

Mineralpedia Details for Axinite-(Mn)

Reset

Axinite-(Mn)

Axinite-(Mn)

Previously called Manganaxinite, this mineral is named for the dominance of manganese in the chemical formula and as a member of the Axinite Group, which in turn received its name from the Greek word for “axe” in reference to the sharp crystal habit. Axinite-Mn is an uncommon mineral that is formed by contact metamorphism and boron metasomatism, and can also be found in pegmatite veins in contact with metamorphosed iron formations and gabbro. Localities for Axinite-Mn include Germany, Ireland, Italy, the United States, Cananda, and Japan, among others.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/manganaxinite.pdf

Formula
Ca2Mn2+Al2BSi4O15(OH) 
Crystal System
Triclinic 
Crystal Habit
Massive - Granular, Lamellar 
Cleavage
Distinct, Poor, Poor 
Luster
Vitreous (Glassy) 
Color
brown, colorless, yellowish, pale violet, reddish 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle - Conchoidal 
Hardness
6.5-7 
WebMineral
View Axinite-(Mn) 
Mindat
View Axinite-(Mn) 

Axinite-(Mn) from Iron Cap Mine, Graham Co., Arizona, United States

Axinite-(Mn)
            from Iron Cap Mine, Graham Co., Arizona, United States

Green-brown thin tabular "axe-head" Manganaxinite crystals to 3mm.

Click thumbnail images for larger view.

Axinite-(Mn) from Franklin, Sussex Co., New Jersey, United States

Axinite-(Mn)
            from Franklin, Sussex Co., New Jersey, United States

Golden honey colored, tabular Axinite crystals to 3mm associated with prismatic, light green Datolite, and glassy pink Rhodochrosite.

Click thumbnail images for larger view.

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2014 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map