PIZGRISCHITE, (Cu,Fe)Cu14PbBi17S35, A NEW SULFOSALT FROM THE SWISS ALPS: DESCRIPTION, CRYSTAL STRUCTURE AND OCCURRENCE

Meisser, Nicolas; Schenk, Kurt; Berlepsch, Peter; Brugger, Joël; Bonin, Michel; Criddle, Alan J.; Thelin, P.; Bussy, F.

doi:10.2113/gscanmin.45.5.1229

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…Hypothetical ordered sequence of split sites within the short arm of column B in meerschautite. (Topa and Makovicky, 2006) and pizgrischite, (Cu,Fe)Cu 14 PbBi 17 S 35 (Meisser et al, 2007).…”

Section: General Organization Of Meerschautitementioning

confidence: 99%

Lead-antimony sulfosalts from Tuscany (Italy). XVII. Meerschautite, (Ag,Cu)_5.5Pb_42.4(Sb,As)_45.1S₁₁₂O_0.8, a new expanded derivative of owyheeite from the Pollone mine, Valdicastello Carducci: occurrence and crystal structure

et al. 2016

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The new mineral species meerschautite, ideally (Ag,Cu)5.5Pb42.4(Sb,As)45.1S112O0.8, has been discovered in the baryte + pyrite ± (Pb-Zn-Ag) deposit of the Pollone mine, near Valdicastello Carducci, Apuan Alps, Tuscany, Italy. It occurs as black prismatic crystals, striated along [100], up to 2 mm long and 0.5 mm thick, associated with baryte, boulangerite, pyrite, quartz and sphalerite. Meerschautite is opaque with a metallic lustre and shows a black streak. In reflected light, meerschautite is white in colour, weakly bireflectant and non pleochroic. With crossed polars, it is distinctly anisotropic with grey to dark grey rotation tints with brownish and greenish shades. Reflectance percentages for COM wavelengths [λ (nm), Rair (%)] are: 470: 39.7/41.4; 546: 38.3/39.9; 589: 37.4/39.0; 650: 35.8/37.2. Electron-microprobe data collected on two different samples gave (wt.%): Cu 0.22, Ag 3.15, Tl 0.07, Pb 48.54, Sb 25.41, As 2.82, S 19.74, Se 0.14, Cl 0.03, sum 100.12 (# 1) and Cu 0.22, Ag 3.04, Tl 0.13, Pb 48.53, Sb 25.40, As 2.93, Bi 0.06, S 19.82, Se 0.13, Cl 0.05, sum 100.31 (# 2). On the basis of 112 anions (S+Se+Cl) per formula unit, the empirical formulae are (Ag5.29Cu0.63)∑5.92(Pb42.43Tl0.06)∑42.49(Sb37.80As6.82)∑44.62(S111.53Se0.32Cl0.15)∑112 (# 1) and (Ag5.08Cu0.62)∑5.70(Pb42.22Tl0.12)∑42.34(Sb37.61As7.07Bi0.05)∑44.73(S111.45Se0.30Cl0.25)∑112 (# 2). Main diffraction lines, corresponding to multiple hkl indices, are [d in Å (relative visual intensity)]: 3.762 (m), 3.663 (s), 3.334 (vs), 3.244 (s), 3.016 (m), 2.968 (m), 2.902 (m), 2.072 (ms). The crystal structure study gave a monoclinic unit cell, space group P21, with a = 8.2393(1), b = 43.6015(13), c = 28.3688(8) Å, β = 94.128(2)°, V = 10164.93(2) Å3, Z = 2. The crystal structure has been solved and refined to a final R1 = 0.122 on the basis of 49,037 observed reflections. The structure is based on two building blocks, both formed by a complex column with a pseudotrigonal Pb6S12 core and two arms of unequal lengths (short and long arms, respectively). Two different kinds of short arms occur in meerschautite. One is an Ag-rich arm, whereas the other shows localized Sb–O–Sb bonds. Meerschautite is an expanded derivative of owyheeite and has quasi-homeotypic relationships with sterryite and parasterryite.

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Section: General Organization Of Meerschautitementioning

confidence: 99%

Lead-antimony sulfosalts from Tuscany (Italy). XVII. Meerschautite, (Ag,Cu)_5.5Pb_42.4(Sb,As)_45.1S₁₁₂O_0.8, a new expanded derivative of owyheeite from the Pollone mine, Valdicastello Carducci: occurrence and crystal structure

et al. 2016

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“…Higher Pb in minerals of this group (e.g., Pršek et al 2005) can indicate the presence of other structurally close mineral phases -pizgrischite (c. 2 wt. % Pb, Meisser et al 2007) or paděraite (c. 7 wt. % Pb, Topa and Makovicky 2006).…”

Section: Minerals Of the Cuprobismutite Homologous Series (Hodrušitementioning

confidence: 99%

Unusual morphological forms of hodrušite from the Rozália vein, Hodruša-Hámre near Banská Štiavnica (Slovak Republic)

Sejkora¹,

Števko²,

Ozdín³

et al. 2015

J. Geosci.

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Rare Cu-Bi sulphosalt, hodrušite, occurs in the Rozália vein (levels X-XIV of the Rozália mine, Hodruša-Hámre ore deposit near Banská Štiavnica, central Slovakia) in two unusual morphological forms. The first type are brownish bronze thin acicular striated crystals, up to 3 mm long, in drusy cavities of quartz-hematite gangue, which are usually grouped into chaotic or irregular aggregates. The second hodrušite type comprises flattened columnar aggregates, up to 1.5 cm long, overgrown by hematite in quartz gangue. These aggregates are distinctly striated with brownish bronze colour and metallic lustre. Abundant W-and Al-rich hematite, chalcopyrite, kaolinite/dickite, siderite, baryte, rare bismuthinite and kupčíkite were found in the association. The earliest columnar aggregates of hodrušite are locally substantially replaced by bismuthinite; these hodrušite-bismuthinite aggregates are further intensively pushed back by hematite displaying W-and Al-rich zones. Acicular crystals of hodrušite in gangue cavities were later than bismuthinite and hematite and their formation was related to remobilisation of Cu and Bi from earlier altered gangue. Powder X-ray diffraction data and chemical composition of both hodrušite types are similar; their unit-cell parameters were refined (monoclinic space group C2/m) as: a 17.552(5), b 3.905(1), c 27.167(9) Å, β 92.44 (3) o , V 1860.5(9) Å 3 (acicular crystals) and a 17.567(2), b 3.9151 (7), c 27.155(5) Å, β 92.43 (1) o , V 1865.9(4) Å 3 (columnar aggregates). Cu-for-Bi substitution is characteristic of both hodrušite types; it influences calculated N chem values (0.98-1.33) to the point that it is impossible to distinguish hodrušite (ideal 1.5) from kupčíkite (ideal 1.0). The problem is resolved by Fe and Ag contents: kupčíkite has more than 2 at. % Fe, cuprobismutite contains more than 2 at. % of Ag; hodrušite usually has Ag and Fe contents below 2 at. %. Hematite is remarkable for its high WO 3 content reaching 4.96 wt. % (0.04 apfu), extremely unusual of a hematite from hydrothermal vein mineralization. Tungsten probably enters the hematite structure via the 2Fe 3+ ↔W 6+ +□ substitution.

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Bi/Te control on gold mineralizing processes in the North China Craton: Insights from the Wulong gold deposit

et al. 2022

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PIZGRISCHITE, (Cu,Fe)Cu14PbBi17S35, A NEW SULFOSALT FROM THE SWISS ALPS: DESCRIPTION, CRYSTAL STRUCTURE AND OCCURRENCE

Abstract: Pizgrischite, (Cu,Fe)Cu 14 PbBi 17 S 35 , is a new mineral species named after the type locality,

Cited by 6 publications

References 15 publications

Lead-antimony sulfosalts from Tuscany (Italy). XVII. Meerschautite, (Ag,Cu)_5.5Pb_42.4(Sb,As)_45.1S₁₁₂O_0.8, a new expanded derivative of owyheeite from the Pollone mine, Valdicastello Carducci: occurrence and crystal structure

Lead-antimony sulfosalts from Tuscany (Italy). XVII. Meerschautite, (Ag,Cu)_5.5Pb_42.4(Sb,As)_45.1S₁₁₂O_0.8, a new expanded derivative of owyheeite from the Pollone mine, Valdicastello Carducci: occurrence and crystal structure

Unusual morphological forms of hodrušite from the Rozália vein, Hodruša-Hámre near Banská Štiavnica (Slovak Republic)

Bi/Te control on gold mineralizing processes in the North China Craton: Insights from the Wulong gold deposit

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PIZGRISCHITE, (Cu,Fe)Cu14PbBi17S35, A NEW SULFOSALT FROM THE SWISS ALPS: DESCRIPTION, CRYSTAL STRUCTURE AND OCCURRENCE

Abstract: Pizgrischite, (Cu,Fe)Cu 14 PbBi 17 S 35 , is a new mineral species named after the type locality,

Cited by 6 publications

References 15 publications

Lead-antimony sulfosalts from Tuscany (Italy). XVII. Meerschautite, (Ag,Cu)5.5Pb42.4(Sb,As)45.1S112O0.8, a new expanded derivative of owyheeite from the Pollone mine, Valdicastello Carducci: occurrence and crystal structure

Lead-antimony sulfosalts from Tuscany (Italy). XVII. Meerschautite, (Ag,Cu)5.5Pb42.4(Sb,As)45.1S112O0.8, a new expanded derivative of owyheeite from the Pollone mine, Valdicastello Carducci: occurrence and crystal structure

Unusual morphological forms of hodrušite from the Rozália vein, Hodruša-Hámre near Banská Štiavnica (Slovak Republic)

Bi/Te control on gold mineralizing processes in the North China Craton: Insights from the Wulong gold deposit

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Lead-antimony sulfosalts from Tuscany (Italy). XVII. Meerschautite, (Ag,Cu)_5.5Pb_42.4(Sb,As)_45.1S₁₁₂O_0.8, a new expanded derivative of owyheeite from the Pollone mine, Valdicastello Carducci: occurrence and crystal structure

Lead-antimony sulfosalts from Tuscany (Italy). XVII. Meerschautite, (Ag,Cu)_5.5Pb_42.4(Sb,As)_45.1S₁₁₂O_0.8, a new expanded derivative of owyheeite from the Pollone mine, Valdicastello Carducci: occurrence and crystal structure