Chabournéite
A valid IMA mineral species
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About Chabournéite
Formula:
AgzTl8-x-zPb4+2xSb40-x-yAsyS68 with 0.00 < x < 0.40(9), 16.15(3)< y < 19.11(10), 0.04(4) < z < 0.11(6)
Redefined in 2021 by IMA Proposal 20-F on chabournéite group.
Previously given as Tl4Pb2(Sb,As)20S34.
Also previously given as Tl21-xPb2x(Sb,As)91-xS147 (x = 0-17.5).
Previously given as Tl4Pb2(Sb,As)20S34.
Also previously given as Tl21-xPb2x(Sb,As)91-xS147 (x = 0-17.5).
Colour:
Black
Lustre:
Greasy, Sub-Metallic
Hardness:
3 - 3½
Specific Gravity:
5.104
Crystal System:
Triclinic
Member of:
Name:
For Chabournéou Glacier, near the type locality.
Homeotype of protochabournéite.
Sb-dominant analogue of dalnegroite. Compare 'UM1982-10-S:AsSbTl'.
Structurally related to the Sartorite Group.
A Pb-free end-member, belonging to the chabournéite homeotypic group, of the Tl2.36Sb5.98As4.59S17 formula, is also triclinic, but with P-1 space group, as studied by Makovicky et al. (2021).
Sb-dominant analogue of dalnegroite. Compare 'UM1982-10-S:AsSbTl'.
Structurally related to the Sartorite Group.
A Pb-free end-member, belonging to the chabournéite homeotypic group, of the Tl2.36Sb5.98As4.59S17 formula, is also triclinic, but with P-1 space group, as studied by Makovicky et al. (2021).
Unique Identifiers
Mindat ID:
957
Long-form identifier:
mindat:1:1:957:5
GUID
(UUID V4):
(UUID V4):
8c97b3d3-b5a1-4711-a998-a7947b5eeb33
IMA Classification of Chabournéite
Approved
IMA status notes:
Redefined by the IMA
IMA Formula:
AgzTl8-x-zPb4+2xSb40-x-yAsyS68 (with 0.00 ≤ x ≤ 0.40, 16.15 ≤ y ≤ 19.11, 0.04 ≤ z ≤ 0.11)
Approval year:
1976
First published:
1981
Approval history:
Redefined formula IMA Proposal 20-F: Miyawaki et al. (2021).
Classification of Chabournéite
2.HD.05e
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
D : With Tl
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
D : With Tl
3.8.12.1
3 : SULFOSALTS
8 : 1 < ø < 2
3 : SULFOSALTS
8 : 1 < ø < 2
5.5.20
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
5 : Sulpharsenites etc. of Tl
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
5 : Sulpharsenites etc. of Tl
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Chb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Chabournéite
Greasy, Sub-Metallic
Transparency:
Opaque
Colour:
Black
Streak:
Red, brown
Hardness:
3 - 3½ on Mohs scale
Hardness:
VHN25=78 - 124 kg/mm2 - Vickers
Fracture:
Conchoidal
Density:
5.104 g/cm3 (Measured) 5.121 g/cm3 (Calculated)
Optical Data of Chabournéite
Anisotropism:
Strong in bluish and greenish colors
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 33.8% | 39.7% |
| 420nm | 33.5% | 39.1% |
| 440nm | 33.2% | 38.6% |
| 460nm | 32.8% | 37.9% |
| 480nm | 32.3% | 37.2% |
| 500nm | 32.0% | 36.6% |
| 520nm | 31.7% | 36.1% |
| 540nm | 31.4% | 35.6% |
| 560nm | 31.1% | 34.9% |
| 580nm | 30.7% | 34.3% |
| 600nm | 30.3% | 33.7% |
| 620nm | 29.7% | 33.0% |
| 640nm | 29.1% | 32.2% |
| 660nm | 28.5% | 31.6% |
| 680nm | 27.9% | 30.9% |
| 700nm | 27.3% | 30.3% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 39.7%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White
Internal Reflections:
Red
Pleochroism:
Weak
Chemistry of Chabournéite
Mindat Formula:
AgzTl8-x-zPb4+2xSb40-x-yAsyS68 with 0.00 < x < 0.40(9), 16.15(3)< y < 19.11(10), 0.04(4) < z < 0.11(6)
Redefined in 2021 by IMA Proposal 20-F on chabournéite group.
Previously given as Tl4Pb2(Sb,As)20S34.
Also previously given as Tl21-xPb2x(Sb,As)91-xS147 (x = 0-17.5).
Redefined in 2021 by IMA Proposal 20-F on chabournéite group.
Previously given as Tl4Pb2(Sb,As)20S34.
Also previously given as Tl21-xPb2x(Sb,As)91-xS147 (x = 0-17.5).
Crystallography of Chabournéite
Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 16.346(5) Å, b = 42.602(10) Å, c = 8.543(3) Å
α = 95.86(3)°, β = 86.91(3)°, γ = 96.88(3)°
α = 95.86(3)°, β = 86.91(3)°, γ = 96.88(3)°
Ratio:
a:b:c = 0.384 : 1 : 0.201
Unit Cell V:
5,870.17 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Crystals to 1 mm.
Comment:
Bonaccorsi et al. (2010) give P-1 and different cell: a 8.150(2), b 8.716(2), c 21.579(4) Å, α 85.18(1)°, β 96.94(1)°, γ 88.60(1)°, V = 1515(1) Å3. This phase later became protochabournéite. For Pb-rich chabournéite (empirical EPMA-derived formula: Ag0.04(1)Tl2.15(2)Pb0.64(1)Sb5.12(1)As5.05(1)S17.32(5)), Biagioni et al. (2015) give a = 8.5197(4), b = 42.461(2), c = 16.293(8) Å, α = 83.351(2), β = 90.958(2), γ = 84.275(2)°, V = 5823(3) Å3.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.196 Å | (50) |
| 4.067 Å | (60) |
| 3.928 Å | (70) |
| 3.573 Å | (100) |
| 3.485 Å | (50) |
| 3.358 Å | (70) |
| 2.853 Å | (70) |
| 2.808 Å | (80) |
| 2.754 Å | (50) |
| 2.709 Å | (70) |
| 2.345 Å | (70) |
| 2.135 Å | (90) |
| 1.810 Å | (50) |
Comments:
Jas Roux, Provence-Alpes-Côte d'Azur, France. Data from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| High-𝑇 alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Geological Setting:
Hydrothermal veins in dolomites.
Type Occurrence of Chabournéite
General Appearance of Type Material:
Very imperfect millimetric crystals. Aggregates, intimately associated with realgar and pierrotite reaching centimetric dimensions.
Place of Conservation of Type Material:
National School of Mines, Paris, France.
Geological Setting of Type Material:
Fracture fillings in dolomitic limestones.
Associated Minerals at Type Locality:
Synonyms of Chabournéite
Other Language Names for Chabournéite
Relationship of Chabournéite to other Species
Member of:
Other Members of this group:
| Dalnegroite | (Tl4Pb2)(As12Sb8)S34 | Tric. 1 : P1 |
| Dewitite | AgzTl10-x-zPb2xSb42-x-yAsyS68 | Tric. 1 : P1 |
| Protochabournéite | Tl4-xPb2+2xSb20-x-yAsyS34 with 0.02(2) < x < 0.34(2), 5.71(9) < y < 6.69(9) | Tric. 1 : P1 |
| Shimenite | Tl5Sb21-yAsyS34 | Tric. 1 : P1 |
| Vallouiseite | Ag3Tl21.5PbSb63As41.5S170 | Tric. 1 : P1 |
Structurally related to group(s):
| Sartorite Group | A group of chemically and structurally very complex sulphosalts which are impossible to identify visually. |
Common Associates
Associated Minerals Based on Photo Data:
| 8 photos of Chabournéite associated with Realgar | As4S4 |
| 7 photos of Chabournéite associated with Wakabayashilite | [(As,Sb)6S9][As4S5] |
| 4 photos of Chabournéite associated with Routhierite | Tl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6 |
Related Minerals - Strunz-mindat Grouping
| 2.HD. | Boscardinite | TlPb4(Sb7As2)S18 |
| 2.HD. | Enneasartorite | Tl6Pb32As70S140 |
| 2.HD. | Gungerite | TlAs5Sb4S13 |
| 2.HD. | Shimenite | Tl5Sb21-yAsyS34 |
| 2.HD. | Dewitite | AgzTl10-x-zPb2xSb42-x-yAsyS68 |
| 2.HD. | Vallouiseite | Ag3Tl21.5PbSb63As41.5S170 |
| 2.HD. | Buynite | TlPb14As17S40 |
| 2.HD. | Giuşcăite | Ag2Tl4Pb4As20Sb2S40 |
| 2.HD.05 | Lorándite | TlAsS2 |
| 2.HD.05 | Weissbergite | TlSbS2 |
| 2.HD.05e | Dalnegroite | (Tl4Pb2)(As12Sb8)S34 |
| 2.HD.15 | Christite | TlHgAsS3 |
| 2.HD.15 | Richardsollyite | TlPbAsS3 |
| 2.HD.20 | Jankovićite | Tl5Sb9(As,Sb)4S22 |
| 2.HD.25 | Rebulite | Tl5Sb5As8S22 |
| 2.HD.30 | Imhofite | Tl5.8As15.4S26 |
| 2.HD.35 | Edenharterite | PbTlAs3S6 |
| 2.HD.40 | Jentschite | TlPbAs2SbS6 |
| 2.HD.45 | Hutchinsonite | TlPbAs5S9 |
| 2.HD.45 | Protochabournéite | Tl4-xPb2+2xSb20-x-yAsyS34 with 0.02(2) < x < 0.34(2), 5.71(9) < y < 6.69(9) |
| 2.HD.50 | Bernardite | TlAs5S8 |
| 2.HD.55 | Sicherite | TlAg2(As,Sb)3S6 |
| 2.HD.55 | Geuerite | Ag2Tl4Pb4As22S40 |
| 2.HD.60 | Gabrielite | Tl6Ag3Cu6(As,Sb)9S21 |
| 2.HD.65 | Tsygankoite | Mn8Tl8Hg2(Sb21Pb2Tl)S48 |
| 2.HD.70 | Drechslerite | Tl4(Sb4-xAsx)S8 (1 < x < 2) |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Chabournéite
mindat.org URL:
https://www.mindat.org/min-957.html
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References for Chabournéite
Reference List:
Fleischer, Michael, Chao, George Y., Pabst, and Adolf (1979) New Mineral Names. American Mineralogist, 64 (1-2) 241-245 p.242
Johan, Zdenek, Mantienne, Joseph, Picot, Paul (1981) La chabournéite, un nouveau minéral thallifère. Bulletin de Minéralogie, 104 (1) 10-15 doi:10.3406/bulmi.1981.7538
Biagioni, Cristian, Moëlo, Yves, Favreau, Georges, Bourgoin, Vincent, Boulliard, Jean-Claude (2015) Structure of Pb-rich chabournéite from Jas Roux, France. Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, 71 (1). 81-88 doi:10.1107/s2052520614028157
Localities for Chabournéite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
France (TL) | |
| Mem. Bur. Rech. Geol. Minière (1977) +3 other references |
Italy | |
| Biagioni et al. (2017) |
Japan | |
| American Mineralogist +2 other references |
Russia | |
| Stepanov +10 other references |
Switzerland | |
| EDXS P. Roth +1 other reference |
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Jas Roux, La Chapelle-en-Valgaudemar, Gap, Hautes-Alpes, Provence-Alpes-Côte d'Azur, France