langbanite

langbanite

[′läŋ·bə‚nīt]
(mineralogy)
An iron-black hexagonal mineral composed of silicate and oxide of manganese, iron, and antimony, occurring in prismatic crystals.
References in periodicals archive ?
Locked in some of these intriguing, and often surprisingly attractive, minerals is some fascinating chemistry: sweden-borgite is sodium beryllium antimonate, bromellite is straight beryllium oxide, Langbanite itself is an appropriate manganese antimony silicate, and there are lead silicates and almost every combination of lead, chlorine and arsenic that you can think of.
Part 1 contains the species abswurmbachite through lamprophyllite, and Part 2 contains the species langbanite through zussmanite.