... encountered: proustite and xanthoconite (both Ag 3 AsS 3 ), smithite and trechmannite (both AgAsS 2 ), and Ag 7 AsS 6 . The phase relations of proustite were studied in detail. The maximum temperatures at which proustite can coexist with either Ag 7 AsS 6 , Ag 2 S, As, or smithite are, respectively, 480...

...L. Taras Bryndzia; O.J. Kleppa Abstract High‐temperature direct‐synthesis calorimetry of the silver thioarsenite minerals smithite (AgAsS 2 ), trechmannite (AgAsS 2 ), and proustite (Ag 3 AsS 3 ) at 793 K yielded mean values for the standard enthalpy of formation from the elements of −59.1 ± 2.3...

...Fig. 1 (a) A stockwork of smithite (red) and jasrouxite (dark) in silicified gangue, split open at the Jas Roux deposit. (b) Macrophotograph of a nest of jasrouxite (black) surrounded by smithite and realgar (red). (c–f) Embayment of myrmekite, composed of As-bearing stibnite ( stb ), smithite...

...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...

... ]: 470, 34.9, 37.3; 546, 33.4, 35.9; 589, 32.4, 35.1; 650, 30.7, 33.5. Anisotropism is distinct and rotation tints vary between dark brown and bluish grey. Ferdowsiite is associated with large corroded crystals of arsenquatrandorite and is partly replaced by guettardite. It also corrodes smithite...

... are jasrouxite, stibnite, smithite, guettardite, chabournéite, pierrotite and As-bearing zink enite. Écrinsite is opaque with metallic lustre. It is brittle without any discernible cleavage and with conchoidal fracture. In reflected light écrinsite is white, pleochroism is not discernible. Internal reflections...

...F ig . 1. Eckerite (reddish-brown) in association with yellowish, fibrous smithite and realgar. ...

...L. Bindi; F. Nestola; E. Makovicky; A. Guastoni; L. De Battisti Abstract Philrothite, ideally TlAs 3 S 5 , is a new mineral from the Lengenbach quarry in the Binn Valley, Valais, Switzerland. It occurs as very rare crystals up to 200 μm across on realgar associated with smithite, rutile...

...F ig . 1. Black euhedral raberite with yellowish fibrous smithite on a dolomite matrix (white). The picture is 1 mm across. ...

... are constrained by a miscibility gap between alpha -miargyrite and chalcostibite from 225 to 325 degrees C. The mixing model for alpha -miargyrite is expanded to include As for which alpha -miargyrite has a limited solubility along the Sb-As join with smithite AgAsS 2 . GeoRef, Copyright 2004, American...

... of both synthetic smithite and trechmannite in polished section are described. 4 12 1967 25 1 1968 Copyright © 1968 by the Mineralogical Society of America 1968 Mineralogical Society of America ...

...Rene Beland Abstract Smithite (Ag 2 S.As 2 S 3 ), proustite and xanthoconite (3Ag 2 A.As 2 S 3 ), wire silver, and argentite were prepared in concentrated alkali sulphide solutions at temperatures below 500 degrees C. and pressures below 900 atmospheres. The solutions were found to be chemically...

...Fig. 5 Phase diagram of Ag 2 S-Sb 2 S 3 -As 2 S 3 pseudo-ternary system at 350°C ( Sugaki & Kitakaze 1984 , 1992 ). Abbreviations are bau: baumstarkite, stb: stibnite, mia: miargyrite, smi: smithite, pyr-pro ss: pyrargyrite-proustite solid solution, liq: liquid. ...

... the original situation. Fractures host veinlets that contain a number of Ag-As-Sb-Pb-rich sulfosalts: tetrahedrite-tennantite, stephanite, pyrargyrite, trechmannite, smithite, miargyrite, andorite, geocronite, seligmannite, guettardite ( Makovicky et al. , 2012 ), and in addition, realgar, pyrite and Au-Ag...