cronstedtite


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cron´stedt`ite

    (krǒn´stĕt`īt)
n.1.(Min.) A mineral consisting principally of silicate of iron, and crystallizing in hexagonal prisms with perfect basal cleavage; - so named from the Swedish mineralogist Cronstedt.
References in periodicals archive ?
Black crystals of cronstedtite with triangular cross-section, displaying only {20[bar.
Mineralogists of the 19th century were much more successful in the description of new layer hydrosilicates: allophane, amesite, antigorite, aspidolite, batavite, biotite /a series name/, celadonite, chamosite, chrysotile /a series name/, clinochlore, corundophyllite, cronstedtite, delessite, diabantite, ephesite, glauconite /a series name/, halloysite, kaolinite, muscovite, nacrite /a polytype/, nontronite, palygorskite, paragonite, penninite /or pennine/, phengite /a series name/, phlogopite, polylithionite, pyrophyllite, ripidolite, roscoelite, saponite, sauconite, sepiolite, serpentine, siderophyllite, stevensite, tainiolite, thuringite, vermiculite /trioctahedral and dioctahedral, distinguished in the 20th century/, volkonskoite, zinnwaldite /a series name/.
Associated minerals are: pyrite, pyrrhotite, siderite and cronstedtite in a brownish clay matrix.
A very few specimens with black, tapered crystals of cronstedtite to 1.