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chovanite

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Journal Article
Published: 01 August 2017
Mineralogical Magazine (2017) 81 (4): 811–831.
...Cristian Biagioni; Yves Moëlo Abstract Two new occurrences of the lead oxy-sulfosalt chovanite have been identified at the Monte Arsiccio and Pollone mines, Apuan Alps, Tuscany, Italy. Chovanite from Monte Arsiccio occurs as black acicular crystals, up to 5 mm long, associated with rouxelite...
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Journal Article
Published: 01 August 2012
European Journal of Mineralogy (2012) 24 (4): 727–740.
...Dan Topa; Jirí Sejkora; Emil Makovicky; Jaroslav Pršek; Daniel Ozdín; Hubert Putz; Herbert Dittrich; Sven Karup-Møller Abstract Chovanite, a new representative of the group of oxysulphosalts of Pb and Sb was found in three hydrothermal deposits of antimony ore, Dúbrava, Malé Železné, and Klačianka...
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<b>Chovanite</b> from the Monte Arsiccio ( a – c ) and Pollone ( d ) mines. ( a ) ...
Published: 01 August 2017
Fig. 1. Chovanite from the Monte Arsiccio ( a – c ) and Pollone ( d ) mines. ( a ) Flattened acicular crystals of chovanite on baryte. Field of view: ∼1.5 mm. ( b – c ) Back-scattered electron images of chovanite, occurring as flattened acicular crystals formed by the parallel association
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Back-scattered photographs of <b>chovanite</b>, dadsonite (in c), boulangerite, ro...
Published: 01 August 2012
Fig. 2 Back-scattered photographs of chovanite, dadsonite (in c), boulangerite, robinsonite, scainiite, quartz and embedding material (both black). (a) Chovanite (medium grey “matrix”) extensively replaces boulangerite (light), robinsonite (dark needles) and scainiite (very dark needles); Dúbrava
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Derivation of <b>chovanite</b> ( a ) from pellouxite ( b ). The horizontal broken ...
Published: 01 August 2017
Fig. 10. Derivation of chovanite ( a ) from pellouxite ( b ). The horizontal broken line in pellouxite gives the intercalated layer in chovanite (with B and C2 fragments). Sub-vertical tie-lines represent shear surfaces passing through the C1 ribbons, and the (Pb13, Pb14) or Pb6 and (Cu,Ag) sites
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Pairs of pseudo-trigonal modules of the Ba 12 Bi 24 S 48  type in <b>chovanite</b>...
Published: 01 August 2017
Fig. 8. Pairs of pseudo-trigonal modules of the Ba 12 Bi 24 S 48 type in chovanite ( a ) and pellouxite ( b ). Junction of module pairs by Pb13a,b and Pb14 in chovanite, and by Pb6 and (Cu,Ag) in pellouxite.
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Unit-cell content of <b>chovanite</b>, as seen down  b .
Published: 01 August 2017
Fig. 2. Unit-cell content of chovanite, as seen down b .
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Atom labels in one asymmetric unit of the crystal structure of <b>chovanite</b> fr...
Published: 01 August 2012
Fig. 3 Atom labels in one asymmetric unit of the crystal structure of chovanite from Dúbrava. Note the oxygen position below Sb14.
Journal Article
Published: 01 June 2014
Mineralogical Magazine (2014) 78 (3): 651–661.
... crystals, black in colour, with bluish-violet iridescence, in vugs of carbonate + baryte + quartz veins embedded in dolostones from the Sant'Olga tunnel. It is associated with Tl-bearing chovanite, sphalerite and valentinite. Its X-ray powder diffraction pattern gives unit-cell parameters a = 43.10(2), b...
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Lead oxy-(chloro)-sulfosalts with waffle-type organization. From top to bot...
Published: 01 August 2017
Fig. 9. Lead oxy-(chloro)-sulfosalts with waffle-type organization. From top to bottom: synthetic (Pb,Mn,Sb) oxy-chloro-sulfide, pillaite, scainiite, pellouxite and chovanite. Layer junctions according to the SnS archetypes are indicated, as well as internal ones, when present.
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Organization of the crystal structure of <b>chovanite</b>, projected along  b , ar...
Published: 01 August 2017
Fig. 4. Organization of the crystal structure of chovanite, projected along b , around lone electron-pair micelles (grey ellipses) and pseudo-trigonal axes (red triangles). The different kinds of modules are shown; the two undulating broken lines delimit one oblique layer of the waffle type.
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Coordination of the oxygen atom in <b>chovanite</b>. Thick lines: shortest ( = str...
Published: 01 August 2017
Fig. 3. Coordination of the oxygen atom in chovanite. Thick lines: shortest ( = strongest) Me 3+ –S and Me 3+ –O bonds ( Me 3+  = Sb, As); thin lines: Pb–S bonds; dotted lines: Pb–O bonds. Bond-strengths (in valence units) are given in italics.
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Oxygen  vs . vacancy ordering along  b  (elongation direction) in synthetic...
Published: 01 August 2017
Fig. 11. Oxygen vs . vacancy ordering along b (elongation direction) in synthetic (Pb,Mn,Sb) oxy-chloro-sulfide ( left ), scainiite ( centre ) and chovanite ( right ). Vacancy: open circle with dashed line. Me 3+ – O bond lengths and alternating short and long Me 3+  – Me 3+ ( Me 3
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The crystal structure of <b>chovanite</b> projected along the  b  axis (~4.05 Å). ...
Published: 01 August 2012
Fig. 4 The crystal structure of chovanite projected along the b axis (~4.05 Å). Unit cell is shown. In order of increasing size, circles represent Sb (red), Pb (blue) and S (white) positions. Light and dark spheres represent atoms at two y levels, 2 Åapart. Oxygen is indicated as the smallest
Journal Article
Published: 01 May 2015
American Mineralogist (2015) 100 (5-6): 1319–1332.
... Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia. F.C. © 2015 Mineralogical Society of America 2015 This New Mineral Names has entries for 25 new minerals, including alcaparrosaite, bastnäsite-(Nd), calciolangbeinite, chovanite, chromio-pargasite (ehimeite), chukhrovite...
Journal Article
Published: 01 September 2019
European Journal of Mineralogy (2019) 31 (5-6): 1055–1065.
... al. , 2012 ; protochabournéite – Orlandi et al. , 2013 ; arsiccioite – Biagioni et al. , 2014b ), as well as thallium-bearing varieties of lead sulfosalts, i.e. , rouxelite and chovanite ( Biagioni et al. , 2014c , 2018a ; Biagioni & Moëlo, 2017b ). Moreover, other thallium sulfosalts...
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Journal Article
Published: 01 June 2016
Mineralogical Magazine (2016) 80 (4): 675–690.
... al ., 2014), as well as other sulfosalt species (sterryite, twinnite, chovanite, boulangerite and zinkenite). Recently, some crystals having a monoclinic unit cell close to but distinct from those of sterryite and parasterryite were identified and characterized as a new mineral species...
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Journal Article
Published: 01 September 2018
European Journal of Mineralogy (2018) 30 (5): 1021–1035.
...; the Tl content is small but significant and it was not reported in previous analyses. The presence of Tl-bearing varieties of non-essential Tl minerals is a characteristic of the Monte Arsiccio ore deposit, e.g. , rouxelite and chovanite ( Biagioni et al. , 2014c , 2017b); the As content...
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Journal Article
Published: 01 March 2019
American Mineralogist (2019) 104 (3): 459–462.
...) ordering in sulfosalts: crystal-structure refinement of a Bi-rich izoklakeite . American Mineralogist , 72 , 821 – 831 . Biagioni , C. , and Moëlo , Y. ( 2017 ) Lead-antimony sulfosalts from Tuscany (Italy). XIX. Crystal chemistry of chovanite from two new occurrences in the Apuan Alps...
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Journal Article
Published: 01 August 2017
European Journal of Mineralogy (2017) 29 (4): 679–688.
... been reported in dufrénoysite and rathite ( Laroussi et al ., 1989 ; Berlepsch et al ., 2002 ; Moëlo et al ., 2008 ), as well as, more recently, in the oxy-sulfosalts rouxelite and chovanite ( Biagioni et al ., 2014b ; Biagioni & Moëlo, 2017b ). Case ii is well exemplified by members...