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realgar

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Journal Article
Published: 29 July 2023
The Canadian Journal of Mineralogy and Petrology (2023) 61 (4): 787–804.
... that arsenic trioxide (As 2 O 3 ), originally deposited during the period of peak-mining emissions, has since been transformed into authigenic sulfides (interpreted to be realgar) down core from peak-mining emissions. Arsenic has also been attenuated by iron (Fe)-oxyhydroxides and roaster-generated iron oxides...
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Journal Article
Published: 14 October 2022
Mineralogical Magazine (2023) 87 (1): 69–78.
... ermakovite, (NH 4 )(As 2 O 3 ) 2 Br, was discovered at the tract of Kukhi-Malik, Fan-Yagnob coal deposit, ca. 75 km N of Dushanbe, Tajikistan. Ermakovite is a fumarolic mineral formed directly from gas from a natural underground coal fire. Associated minerals are sulfur, realgar, amorphous As-sulfides...
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Journal Article
Published: 01 June 2022
American Mineralogist (2022) 107 (6): 1164–1173.
... and dolomite and cemented by orpiment, pyrite, realgar, stibnite, and minor baryte and quartz. It belongs to the latest phases among sulfosalts (chiefly Tl-As-Sb ones) present in the ore. The empirical formula (based on the sum of all atoms = 23 pfu) is Tl 0.99 As 5.29 Sb 3.77 S 12.95 . The Raman spectrum...
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Journal Article
Journal: Economic Geology
Published: 01 June 2022
Economic Geology (2022) 117 (4): 905–922.
... Irregular calcite-realgar vein in brecciated limestone; blocky calcite Part of a mineralized interval (6.06 ppm Au over 3.05 m) 1 Uniform orange luminescence; elemental maps show alternating growth bands with slightly variable rare earth and U contents; these bands are deformed by a kink plane possibly...
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Journal Article
Journal: Geology
Published: 24 March 2022
Geology (2022) 50 (6): 660–664.
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Journal Article
Published: 27 April 2020
Mineralogical Magazine (2020) 84 (3): 477–484.
..., calcite, claudetite, ferrinatrite, gajardoite-3 R , leiteite, magnesiocopiapite, phosphosiderite, pyrite, realgar and talmessite and formed from the oxidation of As-bearing primary phases and alteration by saline fluids derived from evaporating meteoric water under hyperarid conditions. Cuyaite occurs...
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Journal Article
Published: 27 April 2020
Mineralogical Magazine (2020) 84 (3): 420–434.
...Tingting Yue; Shu Chen; Jing Liu Abstract Arsenopyrite (FeAsS) and realgar (As 4 S 4 ) are two common arsenic minerals that often cause serious environmental issues. Centralised treatment of arsenic-containing tailings can reduce land occupation and save management costs. The current work examined...
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Journal Article
Published: 16 May 2019
The Canadian Mineralogist (2019) 57 (3): 403–423.
...Tamara Đorđević; Uwe Kolitsch; Todor Serafimovski; Goran Tasev; Nathalie Tepe; Michael Stöger-Pollach; Thilo Hofmann; Blažo Boev Abstract In the Lojane area (North Macedonia) ores of Sb (stibnite), As (realgar), and Cr (chromite) were mined and processed in a metallurgical plant until 1979. Over...
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Series: Reviews in Economic Geology
Published: 01 January 2018
DOI: 10.5382/rev.20.10
EISBN: 9781629491189
... (carbonate dissolution, silicification, and argillization), ore mineralogy (auriferous arsenian pyrite and marcasite, stibnite, realgar, orpiment, and lorandite), high Au/Ag ratios, and low base metal contents are also typical of Carlin-type gold deposits in Nevada. However, the Allchar deposit differs from...
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Journal Article
Published: 30 November 2017
The Canadian Mineralogist (2017) 55 (6): 1009–1025.
..., orange-yellow sediment at the redox boundary above the water table containing realgar, an unidentified As-S compound, and a magnesium (Mg)-arsenate phase; Facies (IV) structureless, As-poor, pale brown sediment composed of diatom frustules; and Facies (V) algal-rich surface sediment containing hörnesite...
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Journal Article
Published: 01 October 2015
Mineralogical Magazine (2015) 79 (5): 1089–1098.
... μm, associated with dufrénoysite, hatchite, realgar and baryte. Minimum and maximum reflectance data for COM wavelengths in air are [λ (nm): R (%)]: 471.1: 25.8/27.1; 548.3: 25.2/26.6; 586.6: 24.6/25.8; 652.3: 23.9/24.8. Electron microprobe analyses give (wt.%): Cu 2.01(6), Ag 8.50(16), Zn 10.94(20...
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Journal Article
Published: 01 May 2015
American Mineralogist (2015) 100 (5-6): 1222–1229.
...Giovanni Pratesi; Matteo Zoppi Abstract The light-induced alteration of realgar and β-As 4 S 4 is a well-known phenomenon but still displays interesting aspects not completely explained. In the transformation from realgar to pararealgar the molecule As 4 S 4 undergoes a structural modification...
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Journal Article
Published: 01 February 2014
Mineralogical Magazine (2014) 78 (1): 1–9.
...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...
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Journal Article
Published: 01 October 2013
Mineralogical Magazine (2013) 77 (7): 3039–3046.
... and baryte ores. These fractures house veinlets that contain a number of Ag-As-Sb-Pb-rich sulfosalts, tetrahedrite-tennantite, realgar, pyrite and electrum. Barikaite appears as inclusions in guettardite. The mineral is opaque, greyish black with a metallic lustre; it is brittle without any discernible...
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Journal Article
Published: 01 June 2013
The Canadian Mineralogist (2013) 51 (3): 475–494.
... Stazzema (Apuan Alps, Tuscany, Italy). It occurs as compact masses associated with barite, boscardinite, calcite, cymrite, dolomite, pyrite, realgar, routhierite, sphalerite, and stibnite. Protochabournéite is metallic black. Minimum and maximum reflectance data for COM wavelength are [λ (nm): R air...
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Journal Article
Published: 01 October 2012
Mineralogical Magazine (2012) 76 (5): 1153–1163.
... smithite, realgar, hatchite and probable trechmannite, edenharterite, jentschite and two unidentified sulfosalts. Raberite is opaque with a metallic lustre and has a dark brown–red streak. It is brittle with a Vickers hardness (VHN 10 ) of 52 kg mm −2 (range 50–55) corresponding to a Mohs hardness of 2½–3...
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Journal Article
Published: 01 August 2012
American Mineralogist (2012) 97 (8-9): 1320–1329.
...Paolo Ballirano Abstract An in situ high-temperature X-ray powder diffraction study of the thermal behavior of realgar (α-As 4 S 4 ) has been carried out. Data, measured in transmission geometry on a non-hermetically sealed capillary, indicate that the realgar → β-As 4 S 4 phase transition starts...
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Journal Article
Published: 01 August 2012
Mineralogical Magazine (2012) 76 (4): 963–973.
...G. O. Lepore; T. Boffa Ballaran; F. Nestola; L. Bindi; D. Pasqual; P. Bonazzi Abstract Ambient temperature X-ray diffraction data were collected at different pressures from two crystals of β-As 4 S 4 , which were made by heating realgar under vacuum at 295°C for 24 h. These data were used...
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Journal Article
Published: 01 June 2012
Mineralogical Magazine (2012) 76 (3): 743–750.
... marble, associated with realgar, rutile, trechmannite and hutchinsonite. Debattistiite is opaque with a metallic lustre and a grey streak. It is brittle; the Vickers hardness (VHN 25 ) is 80 kg mm −2 (range: 65–94), corresponding to a Mohs hardness of 2–2½. In reflected light debattistiite is dark grey...
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Journal Article
Published: 01 May 2012
American Mineralogist (2012) 97 (5-6): 890–896.
...Matteo Zoppi; Giovanni Pratesi Abstract Among the polymorphs of the compound As 4 S 4 , realgar and β-As 4 S 4 exhibit an interesting phenomenon of light-induced alteration that eventually leads to the transformation to pararealgar and arsenolite through the structural modification of the As 4 S 4...
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