...Brian J. Skinner; Frederick D. Luce Abstract alpha -domeykite, the cubic and low temperature form of Cu 3 As, decomposes at 90 + or - 10 degrees C and approximately 1 atmosphere pressure to beta -domeykite, composition Cu (sub 2.7) As and algodonite, composition Cu (sub 5.2) As. Algodonite has...

...L. S. Ramsdell Abstract Domeykite, algodonite and whitneyite are usually considered as definite minerals, and have been assigned the formulas Cu 3 As, Cu 6 As and Cu 9 As, respectively. However, various investigators have questioned the existence of these compounds, and have reported...

...TABLE 6. CALCULATED X-RAY POWDER DIFFRACTION DATA FOR DIENERITE AND DOMEYKITE ...

... guidelines, 25 mineral names are now modified: domeykite-β becomes trigodomeykite; fergusonite-(Y)-β becomes clinofergusonite-(Y); fergusonite-(Ce)-β becomes clinofergusonite-(Ce); fergusonite-(Nd)-β becomes clinofergusonite-(Nd); ice-VII becomes cubo-ice; roselite-β becomes anorthoroselite; sulphur-β...

... are olivenite, malachite, gilmarite, cornubite, connellite, theoparacelsite, brochantite, cuprite, native copper, algodonite, and domeykite. Lapeyreite occurs in geodes of cuprite (0.5 mm diameter) as aggregates formed by perfect elongate rectangular crystals (up to 0.2 × 0.05 × 0.01 mm in size), acicular...

..., cuprite, native copper, native silver, native silver containing 2 % of mercury, domeykite, djurleite and algodonite. It forms aggregates (0.2 mm diameter) consisting of pseudooctahedral crystals (50 μm maximum dimension). The crystals are red, brownish red. The mineral is tetragonal, I 4̄, a = 7.727(7) Å...

..., cuprite, domeykite, algodonite and native copper. It forms aggregates (1mm diameter) consisting of perfect crystals (0.5 × 0.15 × 0.1 mm maximum dimension). The bottle-green crystals are elongated along a, slightly flattened on {010}, and have a good cleavage on {001}. They are not twinned. The mineral...

... and the “ledouxite” of Richards. The phases identified include α-domey-kite, β-domeykite, algodonite, arsenical copper, rammelsbergite, pararammelsbergite, and niccolite. Sealed silica tube studies in the system Cu-Ni-As at 510 ± 5°C show negligible solubility of copper in the nickel arsenides and nickel...

... with new finds of domeykite and algodonite. Unusual among these finds has been the discovery of crystals of rammelsbergite and algodonite. Copyright © 1963 by the Mineralogical Society of America 1963 Mineralogical Society of America ...

... structure of alpha domeykite, a structure related to the A15 type . Z. Kristallogr. , 145 , 334 – 45 . Mandarino , J.A. ( 1999 ) Fleischer’s Glossary of Mineral Species, eighth edition . Mineralogical Record , Tucson, Arizona . Martin , R.F. and Blackburn , W.H. ( 1999...

..., established by a least-squares method from X-ray powder-diffraction data: 11.782(2) Å. This value practically does not differ from the value obtained by Rietveld analysis ( Table 1 ). “Anomalous” kutinaite also was encountered; it exsolved from silver-containing high-temperature “β-domeykite...

... stability useful to evaluate fissure formation at Långban and related deposits, but the presence of domeykite (“α-domeykite” of the older literature) associated with calcite and pyroaurite (± arsenosilicate minerals) in partly open fissures suggests a temperature of formation below 90°C ( Burke 1986...

...Fig. 1. Lamellar bundles of jeankempite intergrown with guérinite on altered α-domeykite, with annabergite, calcite and cream coloured ankerite. Horizontal field of view is 3.0 mm. ...

... , corresponding to the formula of natural kutinaite as known at the time, appears in the As-richer parts of the system at 400°C, being involved in the β-domeykite–kutinaite–arsenic, β-domeykite–kutinaite–silver and arsenic–kutinaite–silver ternary fields. By using the synthetic Cu 14 Ag 6 As 7 material produced...

... sulfosalts, baryte, calcite, chalcopyrite, domeykite, feldspar, pyrite, quartz, native silver and stibnite. Tapiaite occurs as a late-stage, low-temperature, secondary mineral in narrow seams and vughs in the oxidized upper portion of the vein. The matrix is an intergrowth of quartz and microcline–albite...

... by Parker et al. ( 1963 ). The specimens of alumolukrahnite were collected by one of the authors (AAMD) in 2011. The deeper unoxidised portion of the vein contains primary and supergene minerals including acanthite, native arsenic, Ag sulfosalts, baryte, calcite, chalcopyrite, domeykite, feldspar...

... through the CNMNC for approval. In order to be consistent with the new guidelines, 25 mineral names were modified: domeykite-β becomes trigodomeykite, fergusonite-(Y)-β becomes clinofergusonite-(Y), fergusonite-(Ce)-β becomes clinofergusonite-(Ce), fergusonite-(Nd)-β becomes clinofergusonite-(Nd), ice-VII...