matildite

matildite

[mə′til‚dīt]
(mineralogy)
AgBiS2 An iron black to gray, orthorhombic mineral consisting of silver bismuth sulfide; occurrence is massive or granular.
References in periodicals archive ?
The silver is present as inclusions in the galena with minor amounts of polybasite, freibergite, pyrargyrite and matildite.
arsenic, arsenopyrite, arsenosulvanite, barite, (*) berndtite, bismuthinite bournonite, calcite, cassiterite, chalcopyrite, chlorargyrite, diaphorite, franckeite, freibergite galena, goethite (iridescent), goslarite, halotrichite, hematite, jamesonite, jarosite, matildite, melanterite, miargyrite, nacrite, (*) ottemannite, phosphophyllite, pickeringite, pyrargyrite, pyrite, pyrostilpnite, quarz, siderite, sideronatrite, siderotil, silver, smitsonite, sphalerite, stannite, stephanite, stibnite, tetrahedrite, valentinite, voltaite, wavellite, wolframite, wurtzite Cerro San Pedro Large orthoclase phenocrysts, often replaced by quartz, chlorite, siderite, etc.
Matildite occurs as minute embedded masses in ores of the Nikolaevskiy mine.
Matildite has been reported from Cerro Rico as brilliant, gray to black, imperfectly formed crystals in granular aggregates and compact, laminary masses associated with tetrahedrite, sphalerite, andorite and pyrargyrite (Lindgren and Creveling, 1928; Perez and Tenago, 1992).