Abstract
Cannizzarite was described from the deeper parts of fumaroles on Vulcano, Lipari Islands, by Zambonini, De Fiore, and Carobbi (1925), who pointed out the similarity between their chemical formula for the new mineral (Pb Bi4S7 and that of livingstonite (Hg Sb4S7). A prominent prism at about 45° to (010) suggested a similarity between cannizzarite and stibnite, which is pseudo-tetragonal and very like bismuthinite in form. Since livingstonite was early described as resembling stibnite in form, a relation between cannizzarite, livingstonite, stibnite, and bismuthinite seemed to be established. Recently, however, Richmond (1936) has shown that livingstonite is monoclinic and quite unrelated to stibnite. Furthermore, the pseudo-tetragonal prism noted on cannizzarite appears actually to have been measured on bismuthinite. Consequently, the suggested relations of cannizzarite are without foundation.
