manganaxinite
/maŋɡəˈnaksɪnʌɪt/Mineralogy
noun
A mineral of the axinite group, Ca2Mn2+Al2BSi4O15OH, which crystallizes in the triclinic system, and occurs in pegmatite formations. More generally: an axinite with a composition near to this, specifically one with a high proportion of calcium, and with a greater proportion of manganese than iron.
Origin
Early 20th century; earliest use found in Mineralogy Magazine. From German Manganaxinit from Mangan + Axinit.