...William G. Mumme Abstract Studies of specimens from Falun, Sweden, reported to contain the two minerals weibullite and wittite have established at least three selenium-rich bismuth–lead sulphosalts of similar chemistry. A nomenclature is proposed in which two of the minerals retain the old names...

... Se 15 , whereas along the join from Pb 8 Bi 6 S 17 (lillanite) to Pb 8 Bi 4 Se 17 there are two terminal solid solutions. The join PbBi 2 S 4 -PbBi 2 Se 4 is characterized by an extensive solid solution based on weibullite. Six extensive ranges of solid solution exist in the system PbSe-PbTe-Bi 2 Se...

... Creek; 1 and 2: analyses from aggregates in Figs. 1a and 1b , respectively; 3: analysis by Mumme (1976) ; 4: Felbertal]. J: junoite [1: Tennant Creek, 2: Felbertal]. F: Felbertalite [Felbertal]. C: selenian cannizzarrite [1 and 2: Tennant Creek, Figs. 1a and 1b ; 3: Mumme (1980) ]. W: weibullite [1...

... . Selenium shows a strong preference for the marginal anion sites of the H layer, as was also observed by Mumme (1980) for weibullite, Mumme (1976) and Mumme et al. (2009) for proudite, and suggested by Mozgova et al . (1992) for cannizzarite. The latter authors based their explanation...

... nouvelle de la weibullite et de la wittite . C.R. Acad. Sci. Paris, Sér . D 282 , 137 – 139 . Johansson , K. ( 1924 ): Ett par selenförande mineral fran Falu gruva . Arkiv Kemi, Mineral. Geol . 9 ( 8 ), 1 – 7 . Litavrina , R.F. , Romanenko , I.M. & Tschubarov , V.M...

... ( Makovicky & Mumme 1986 , Armbruster & Hummel 1987 ), hodrushite ( Kupčík & Makovicky 1968 ), weibullite ( Mumme 1980 ), and scainiite ( Moëlo et al. 2000 ). F ig . 1. The crystal structure of neyite. Pb atoms are blue, Bi atoms are red, mixed Pb–Bi positions, purple with shades...

... of galenobismutite forms a pair of homologues with that of weibullite ( Mumme 1980 ). Within the modular description ( Makovicky 1981 ), these structures are interpreted as members of a plesiotypic series composed of structures derived from cannizzarite ( Makovicky 1997 , Ferraris et al. 2004 ). Single...

...) . STR: Moëlo et al. (1997) . The general structural formula is Cu 1+ x Pb 2+ x Bi 3− x − y Sb y S 7 . Weibullite , 6Q, 7 / 2 H – Ag 0.33 Pb 5.33 Bi 8.33 (S, Se) 18 STR: Mumme (1980c) . 2. Boxwork derivatives of cannizzarite This boxwork type results from a combination...

...) 9 ] and Se-rich weibullite [Pb 5 Bi 8 (Se,S) 18 ] by sulfidation of laitakarite. In late-stage Alpine vugs (~2.5 kbar and 350 °C), well-shaped Dauphiné habit quartz crystals coexist with albite, abundant clinochlore ± chamosite, coffinite, arsenopyrite, chalcopyrite, minor Ag-poor lillianite (Ag x...

... compounds, among them laitakarite, weibullite, and bismuthinite ( Karup-Møller, 1970 ). Based on a fluid inclusion study, it has been suggested that the Se-Au–rich ore at Falun was formed from a complex hydrothermal system that postdated the massive sulfide ore deposition and subsequent deformation ( Åberg...

... by chalcopyrite and sphalerite. The ore body core is composed of sphalerite–chalcopyrite–pyrrhotite, with galena and subordinate arsenopyrite, cobaltite, Bi-containing minerals (bismuth, bismuthite), naumannite, Ag–Au association, copper gold, bogdanovichite [AgBiSe 2 –AgBi(Se,S) 2 ], weibullite [Pb 6 Bi 8 (Se,S...

... Watkinsonite Cu 2 PbBi 4 (Se,S) 8 Cu,Pb/Bi Nordströmite CuPb 3 Bi 7 (S,Se) 14 Pb,Cu/Bi Junoite Cu 2 Pb 3 Bi 8 (S,Se) 16 Pb,Cu/Bi Proudite Cu 2 Pb 16 Bi 20 (S,Se) 47 Pb,Cu/Bi Weibullite Ag 0.33 Pb 5.33 Bi 8.33 (S,Se) 18 Pb,Ag/Bi Wittite Pb 8 Bi 10 (S,Se) 23 Pb/Bi...

... . Can. Mineral . 24 , 385 – 397 . Karup-Moller , S. ( 1970 ): Weibullite, laitakarite, and bismuthinite from Falun, Sweden . Geol. Fören. Stockholm Förh . 92 , 181 – 187 . Kato , A. ( 1959 ): Ikunolite, a new bismuth mineral from the Ikuno mine, Japan . Mineral J . 2...

... subcells matches with 27 centered H subcells. (b) Weibullite Ag 0.33 Pb 5.33 Bi 8.33 (S,Se) 18 (Mumme 1980), a derivative of the cannizzarite structure by means of composition-nonconservative glide planes (100) at x = ¼ and ¾. An example of a structure which combines accretional and variable-fit...

... to the formation of rare seleniosels [wittite, Pb 3 Bi 4 (S, Se) 9 and weibullite, Pb 5 Bi 8 (Se, S) 18 ] by sulfidation of laitakarite ± Se-rich galena ( Meisser and Beck 2000 ). During the Tertiary metamorphism under lowest greenschist-facies conditions, the ores were partially remobilized, and abundant...

... Compounds 265 , 170 – 175 . Karup-Moller , S. ( 1970 ): Weibullite, laitakarite, and bismuthinite from Falun, Sweden . Geol. Fören. Stockholm Förh . 92 , 181 – 187 . Karup-Moller , S. ( 1973 ): A giessenite–cosalite–galenabearing mineral suite from the Bjørkåsen sulphide...