Sorosilicates (Si2O7 groups), axinite group
Specific gravity: 3.30 to 3.36
Hardness: 6½ to 7
Colour: Brown, golden-yellow
Solubility: Insoluble in water, hydrochloric, nitric and sulphuric acid
Common impurities: Ti,Fe,Mg,Na,K,H2O
Axinite-(Mn) is found in quartz - calcite
veins, igneous contact zones especially with
rocks and some granite pegmatites
(Dana). It is typically formed by contact metamorphism and boron
Associated minerals include quartz, plagioclase, microcline, chamosite, spessartine, andradite, johannsenite, rhodonite, tourmaline, chlorite, K-feldspar and datolite (Dana, HOM).
In Minnesota, axinite-(Mn) has been found in a pegmatite vein cutting metamorphosed iron formation at a contact with gabbro (HOM).
At the type locality the Franklin Mine, Franklin Mining District, Sussex County, New Jersey, USA, axinite-(Mn) occurs in a zinc-iron polymetalic metamorphosed deposit hosted by marble. Associated minerals include rhodonite, hendricksite, hancockite, baryte and andradite (Mindat).
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