stichtite


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stichtite

[′sti‚kīt]
(mineralogy)
Mg6Cr2(CO3)(OH)16·4H2O A lilac-colored rhombohedral mineral composed of hydrous basic carbonate of magnesium and chromium.
References in periodicals archive ?
The term "bouazzerite" had earlier been used by the local miners for an iron-rich variety of stichtite, but as a species name it was discredited by Caillere (1942) and again by Paclt (1953).
Compact black masses of chromite are distinctive for their density (4.5-4.8) and their magnetism, but above all for their common association of scaly rose-violet stichtite. In Vein 2, Bou Azzer, chromite occurs with quartz in gangue, as pitch-black grains with resinous luster and rarely as tiny (0.5-mm) octahedral crystals which may be acid-etched out of the enclosing dolomite.
Specimens showing transparent gray spheres of prehnite, with stichtite, in granular chromite, have been collected in a small open-pit mine east of Agoudal and in ore piles of chromite from Inguijem.
Stichtite [Mg.sub.6][Cr.sub.2](C[O.sub.3])(OH)[.sub.16] x 4[H.sub.2]O
Although rose-colored cobalt minerals are very common in the area, this rose-colored material did not look to us like a cobalt-bearing mineral, reminding us, rather, of stichtite from Australia.
Stichtite is found commonly elsewhere in the district too.
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