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Mineral contains: Geffroyite
Fleischer M, Cabri L J, Chao G Y, Mandarino J A, Pabst A (1982) New mineral names. American Mineralogist 67, 1074-1082
Hall S R, Stewart J M (1973) The crystal structure of argentian pentlandite (Fe,Ni)8AgS8, compared with the refined structure of pentlandite (Fe,Ni)9S8. The Canadian Mineralogist 12, 169-177
Johan Z, Picot P, Ruhlmann F (1982) Evolution paragénétique de la minéralisation uranifère de Chaméane (Puy-de-Dôme), France: chaméanite, geffroyite et giraudite, trois séléniures nouveaux de Cu, Fe, Ag et As. Tschermaks Mineralogische und Petrographische Mitteilungen 29, 151-167