...F ig . 4. a. Hand specimen of allargentum showing the isometric granular grains on the broken surface. Field of view is about 4 cm. b. Photomicrograph of a polished section in oil showing the same fracture features. Symbols: Alg (allargentum), Ag (native silver). c. In hand specimen, dyscrasite...

...Jiří Zachariáš; Matěj Němec Abstract Rare phases of the Au–Ag–Sb system were recognized in the Krásná Hora Sb-Au deposit (Sb 1.5–3 wt.%; Au 3–5 ppm), Czech Republic which correspond to auriferous dyscrasite (up to 7 at.% Au), auriferous allargentum (up to 34 at.% Au), and an unnamed phase...

...Fig. 5. BSE images showing: (A) stable assemblage of breithauptite and allargentum in GR7; (B, C) breithauptite and Ag SS in GR3 and GR5; (D) melt occurring with Sb in GR6; (E) separation of two melts during quenching, breithauptite and nisbite forming independently and around breithauptite...

... to that of osmium and allargentum, with a = 2.7297(4) Å, c = 4.3377(6) Å, and V = 27.99(1) Å 3 ; the c:a ratio is 1.59. The probable space-group is P 6 3 / mmc , and Z = 2; the calculated density is 21.86(1) g/cm 3 . The W-rich alloy is associated with an Os-Ru-Ir alloy rich in Fe (7.0–9.7 wt%), which exhibits...

... given so that the reader could go directly to the softbound volume. Celsian is classified as an alkali feldspar on page 82 and 126; however, Ba is an alkaline earth. Algodonite, Cu 6 As, and allargentum, Ag 7 Sb, have only two crystallographic sites, so that the formulae are misleading. Members...

... phase ( Fig. 2 ). Particle size (up to 5 μm) is not always suitable for obtaining a quantitative analysis. The Sb:Ag ratio is about 1:4 ( Table 5 ). There are two intermetallic compounds in the system Ag-Sb: allargentum Ag 6 Sb and dyscrasite Ag 3 Sb. Investigation of natural silver antimonides...

... al ., 1988) and hexagonal close packed allargentum (2.92 Å – Petruk et al ., 1970). In the Ag-rich arm of parasterryite, the Ag–Ag distance is 3.004 Å (Moëlo et al ., 2012). The Ag sites have various geometries, from distorted octahedral, with bond distances ranging from 2.54 to 3.31 Å, to a five...

... , Prague, Czech Republic . Petruk W. Cabri L.J. Harris D.C. Stewart J.M. Clark L.A. ( 1970 ) Allargentum, redefined . The Canadian Mineralogist , 10 , 163 – 172 . Suh I.-K. Ohta H. Waseda Y. ( 1988 ) High-temperature thermal expansion of six metallic...

..., Academy of Sciences of the Czech Republic , Prague, Czech Republic . Petruk , W. , Cabri , L.J. , Harris , D.C. , Stewart , J.M. , & Clark , L.A. ( 1970 ) Allargentum, redefined . Canadian Mineralogist 10 , 163 – 172 . Reuter , B. & Hardel , K...

... of equilibrium relationships. However, the absence of allargentum or dyscrasite and the lack of direct textural evidence about the relationships of native silver with acanthite and with pyrargyrite or miargyrite preclude any accurate determination of temperature based on the application of the isothermal...

... . Petruk W. Cabri L.J. Harris D.C. Stewart J.M. Clark L.A. ( 1970 ) Allargentum, redefined . The Canadian Mineralogist , 10 , 163 – 172 . Petruk W. Owens D.R. Stewart J.M. Murray E.J. ( 1974 ) Observations on acanthite, aguilarite and naumannite...