geocronite


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geocronite

[jē′äk·rə‚nīt]
(mineralogy)
Pb5(Sb,As)2S3 A mineral composed of lead-gray lead antimony arsenic sulfide.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Geocronite, the first sulfosalt to crystallize in stage 2b, also forms in the 400[degrees]C range.
Alabandite (*)Apatite Arsenic (*)Pb-As-S glass (*)Barite (*)Baumhauerite-2a (*)Bournonite (*)Calcite (*)Chalcopyrite Chatkalite Clinozoisite Geocronite Gratonite (*)Hutchinsonite Jamesonite Manganaxinite Marcas ire (*)Orpiment Realgar Robinsonite (*)Scheelite Seligmannite Stannite (*)Wurtzite
Arsenopyrite, geocronite and hubnerite have also been reported, but are quite rare.
Geocronite is a very rare mineral at Casapalca in specimen quality.
In the San Jose de Alis prospect, north of Yauricocha, geocronite occurs intergrown with galena.
The red variety is associated with galena, geocronite and bournonite; the yellow variety with colusite, wurtzite and robinsonite.