网页Geocronite is a mineral, a mixed sulfosalt containing lead, antimony, and arsenic with a formula of Pb 14 (Sb, As) 6 S 23. Geocronite is the antimony rich endmember of a solid solution series. The arsenic rich endmember is named jordanite. It occurs as grey, black, to silvery white monoclinic crystals. It is found in hydrothermal veins usually ...