...Herta Effenberger; Werner H. Paar; Dan Topa; Franz J. Culetto; Gerald Giester Abstract Synthetic nagyagite was grown from a melt as part of a search for materials with high-temperature superconductivity. Electron microprobe analyses of synthetic nagyagite and of nagyagite from the type locality...

... fluid phase separation in the ore-forming environment. A positive correlation of Au with Pb, Sb, Bi, and Te confirms the presence of nanoinclusions of mineral phases such as nagyagite, Pb-Sb-Bi tellurides, Au-Ag tellurides, tellurosulfides, and sulfosalts within pyrites, particularly in the vein-hosted...

... of deviations from stoichiometry, the compositional field of sylvanite is clearly separated from those of krennerite and of calaverite. Nagyagite corresponds to the composition Pb 5.00 Au 0.77 Sb 1.10 (Te 2.02 S 5.43 ) 7.45 (Cripple Creek) and Pb 5.00 Au 0.56 Sb 1.06 (Te 2.23 S 5.40 ) 7.63 (Nagyag). 7 7...

... of the coordination of the Me 1 and Me 2 atoms. As it is well known, buckhornite exhibits close structural relationship to nagyagite, [Pb(Pb,Sb)S 2 ][(Au, Te)] ( Effenberger et al ., 1999 ), and they can be considered as members of a homologous series. In buckhornite, two (Pb,Bi)S sheets form one slice...

... the gangue minerals are calcite and quartz. The mineral occurs as anhedral to subhedral grains up to 300 μm in cavities and vugs of large nagyagite crystals ( Fig. 1 ), and it does not show any inclusion or intergrowth of other minerals. The contacts between the “vug” mineral (museumite) and the nagyágite...

... in white and marked HREDS-2) in (B), respectively. (E–F) HRTEM of calaverite and native gold circled in red in (B). The breakdown of the Au-bearing phase nagyágite into an assemblage of gold, altaite, and native tellurium through the action of hydrothermal fluids has recently been documented...

... of the Mátra and Börszöny-Visegrád Mountains, North Hungary . Geologica Hungarica , 24 , 79 – 96 . Effenberger , H. , Paar , W.H. , Topa , D. , Culetto , F.J. and Giester , G. ( 1999 ) Towards the crystal structure of nagyagite, [Pb(Pb,Sb)S 2 ](Au,Te) . American Mineralogist...

...-tellurides, nagyagite and buckhornite, which were structurally characterized by Effenberger et al. (1999 , 2000 ). In the latter minerals, however, gold occurs in telluride layers, quite in line with the mineralogical importance of gold and Au-Ag tellurides, whereas the remaining cations (Pb, Sb, and Bi...

... of polytelluride anions . Coordination Chemistry Reviews , 200 – 202 , 187–205. Sung Y.H. Ciobanu C.L. Pring A. Brugger J. Skinner W. Cook N.J. Nugus M. ( 2007 ) Tellurides from Sunrise Dam gold deposit, Yilgarn Craton, Western Australia: a new occurrence of nagyagite...

... for automatic solution of crystal structures. University of Göttingen, Germany. ——— ( 1997b ) SHELXL-97. A program for crystal structure refinement. University of Göttingen, Germany. Simon, G., Alderton, D.H.M., and Bleser, T. ( 1994 ) Arsenian nagyagite from Sacarîmb, Romania: a possible new mineral...

..., D., Culetto, F.J., and Giester, G. ( 1999 ) Toward the crystal structure of nagyagite, [Pb(Pb,Sb)S 2 ][(Au,Te)]. American Mineralogist , 84 , 669 –676. Effenberger, H., Paar, W.H., Topa, Criddle, A.J., and Fleck, M. ( 2002 ) The new mineral baumstarkite and a structural reinvestigation...

... described for the first time within deposits of the Golden Quadrangle. Săcărâmb is the type locality for krennerite, muthmannite, nagyagite, petzite, stützite and, more recently, museumite ( Bindi & Cipriani 2004 ); Baia de Arieş is the type locality for sylvanite. Native tellurium and tellurite...

... argentite, proustite, tetrahedrite, freibergite, safflorite, and nagyagite, which accounts for the high Te values (-20 ppm) reported from the vein ( Marikovsky, 1958 ). Free colloidal gold is recorded from the dark, banded, pyritic botryoidal quartz in the Sucre vein ( Marikovsky, 1958...

... - cervelleite; Clv - calaverite; Emp - Empressite; Glf - goldfieldite; Hdl - hedleyite; Hes - hessite; Ik - ikunolite; Js-A - joséite-A; Js-B - joséite-B; Jo - jonassonite; Knn - krennerite; Kos - kostovite; Mld - maldonite; Mlt - melonite; Ngy - nagyágite; Ptz - petzite; Syl - Sylvanite; Stz - stützite; Tb...

... ; Dye 2015 ). Gold tellurides, including calaverite (AuTe 2 ), sylvanite ((Au,Ag) 2 Te 4 ), krennerite ((Au,Ag)Te 2 ), nagyagite (Pb 5 Au(Sb,Bi)Te 2 S 6 ) and petzite (Ag 3 AuTe 2 ), occur in veins, vugs, and hydrothermal breccia pipes. Gold tellurides are commonly accompanied by other Te-bearing...

... , Y.-H. , Ciobanu , C.L. , Pring , A. , Brugger , J. , Skinner , W. , Cook , N.J. and Nugus , M. ( 2007 ) Tellurides from the Sunrise Dam gold deposit, Yilgarn Craton, western Australia: a new occurrence of nagyagite . Mineralogy and Petrology , 91 , 249 – 270...

... is the type locality for the minerals petzite (Ag 3 AuTe 2 ), krennerite (AuTe 2 ), stutzite(Ag 5-x Te 3 ), nagyagite (Pb 5 Au(Te,Sb) 4 S 5-8 ), muthmannite ((Ag,Au)Te), and krautite (MnHAsO 4 .H 2 O). Gold in its native form is rare and most of the gold ore consists of nagyagite and sylvanite. One notable...

... electron microscope. b.d.l., Below detection limit. Mineral X is intimately intergrown with tetradymite and hessite and requires additional identification. Gold mineralization of the Raigorodok deposit is represented by native gold only, although gold tellurides (petzite, nagyagite, calaverite...