cotunnite

cotunnite

[kə′tə‚nīt]
(mineralogy)
PbCl2 An alteration product of galena; a soft, white to yellowish mineral that crystallizes in the orthorhombic crystal system.
References in periodicals archive ?
More abundant minerals included scheelite (CaW[O.sub.4]) (Figure 6(h)), barite (BaS[O.sub.4]) (Figure 6(g)), rutile (Ti[O.sub.2]) (Figures 6(f) and 6(g)), cotunnite (Pb[Cl.sub.2]) (Figure 7(h)), cinnabar (HgS) (Figure 7(d)), and stibnite ([Sb.sub.2][S.sub.3]).
(1) Low-temperature sulfur incrustations from Ebeko volcano contain appreciable amounts of trace elements stored in rock particles, metal sulfides (e.g., argentite ([Ag.sub.2]S), covellite (CuS), cadmoindite (Cd[In.sub.2][S.sub.4]), famatinite ([Cu.sub.3]Sb[S.sub.4])), chlorides (cotunnite (Pb[Cl.sub.2])), sulfates (anhydrite (CaS[O.sub.4]), alunite [(K[Al.sub.3](S[O.sub.4]).sub.2][(OH).sub.6]), anglesite (PbS[O.sub.4]), barite (BaS[O.sub.4])), and tungstates (scheelite (CaW[O.sub.4])).
Associated minerals are: cotunnite, sophiite, ilinskite, georgbokite, chloromenite and an undefined Cu-Pb selenite.
Cotunnite, Pb[Cl.sub.2] [ILLUSTRATION FOR FIGURE 6 OMITTED], is another mineral formed around fumaroles, and is one of several halides occurring at Monte Somma/Vesuvius.