...Daniel E. Harlov Abstract Experimental Ag-Cu exchange equilibria (evacuated silica tubes; variable mass ratio) involving proustite (Ag,Cu) 3 AsS 3 , smithite AgAsS 2 , pearceite (Ag,Cu) 16 As 2 S 11 , lautite CuAsS, and sinnerite Cu 6 As 4 S 9 are reported over the temperature range 150-350 degrees...

...Siegfried Maske; Brian J. Skinner Abstract Ternary phases in the system Cu-As-S are luzonite, enargite, tennantite, lautite (CuAsS), sinnerite (Cu 6 As 4 S 9 ) and a new compound A (Cu 24 As 12 S 31 ). The only compound to have an extensive composition field is tennantite, for which the generalized...

.... , Catelani T. , Chelazzi L. and Bonazzi P. ( 2008 ) Reinvestigation of the crystal structure of lautite, CuAsS . Acta Crystallographica , E64 , i22...

... = tennantite-tetrahedrite; Sin = sinnerite; Wa = watanabeite; Ski = skinneite; Zhh = zhonghongite; Chst = chalcostibite; Lt = lautite. (Color online.) ...

... a ‘pyramidal’ coordination with two S and one As. The values observed for the As–As bonds are in keeping with that observed in lautite ( Bindi et al. , 2008 ) and those typically observed in As–S molecular compounds (e.g. dimorphite, realgar, uzonite; Bonazzi and Bindi, 2008 ). Table 5 shows the X-ray...

... phase in the sediment. (c) EDS spectra of the high-backscatter grain composed of As-Cu-S. Possible minerals include tennantite, luzonite, enargite, lautite, or sinnerite. ...

... compounds with equal proportions (such as CuAsS - lautite) have InfEnt = 1.099, and so on. Whatever the number of elements in a formula, the InfEnt is highest for elements in equal proportions, and it drops as the proportions deviate from equality. In addition to the features of the Qual functions...

... 60 , 998 – 1012 . Marumo F. Nowacki W. ( 1964 ) The crystal structure of lautite and of sinnerite, a new mineral from the Lengenbach Quarry . Schweizer Mineralogische und Petrographische Mitteilungen 44 , 440 – 454 . Maske S. Skinner B.J. ( 1971 ) Studies...

... species of thallium sulfosalt from Lengenbach, Switzerland . The Canadian Mineralogist , 44 , 141 – 158 . Belendorff K. ( 1986 ) A paragenesis of rare minerals from Nieder-Beerbach, Odenwald, Germany: Lautite, kutinaite, paxite . Neues Jahrbuch für Mineralogie, Monatshefte , 11...

... 1973 ). (E) The system Cu–As–S (modified from Maske & Skinner 1971 ), showing the distribution of mineral phases and melt at 300°C, and the distribution of melt at 500°C, 600°C and 665.5°C. Symbols: Cv: covellite, En: enargite, A: unnamed compound, S: sinnerite, Lt: lautite, Dom: domeykite, fcc...

... sulfides are the gersdorffite–cobaltite solid solution series ( Piestrzyński 2007 ). Accessory Co and/or Ni minerals include Co–Ni disulfides, rammelsbergite, nickeline, linneite, siegenite, carrolite, skutterudite and lautite ( Speczik and Wojciechowski 1997 ; Speczik et al. 1997 ; Kucha 2007...

.... A = unnamed compound, Cv = covellite, Dom = domeykite, En = enargite, fcc = face centered cubic, hcp = hexagonal closet packed, Lt = lautite, S = sinnerite. J. Liquidus surface map of the system Fe-Sb-S (after Barton, 1971 ). All of the fields in the detail to the right are + L 2 . Note that there is only...

...) Catamarcaite Cu 6 GeWS 8 (Putz et al. 2005). Grey tetrahedrally coordinated cations: Cu, black ones: Ge. Solid interstitial tetrahedra: W. (c) CdGa 2 S 4 ( Gastaldi et al. 1985 ). Gallium – solid tetrahedra of two kinds; Cd – grey spheres. (d) Lautite CuAsS (Craig and Sephenson 1965). Coordination tetrahedra...