beudantite

beudantite

[′byüd·ən‚īt]
(mineralogy)
PbFe3(AsO4)(SO4)(OH)6 A black, dark green, or brown, hexagonal mineral consisting of a basic sulfate-arsenate of lead and ferric iron; occurs as rhombohedral crystals.
References in periodicals archive ?
All eight composites have mineralogy consisting of K-feldspar (47-95%), albite (15-41%), goethite (3-11%) and biotite (1-11%) with minor amounts of fluorite, alunite, beudantite (or jarosite) and pyrite identified in some samples.