Lévyclaudite
A valid IMA mineral species
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Formula:
Pb8Sn7Cu3(Bi,Sb)3S28
Colour:
Grey
Lustre:
Metallic
Hardness:
2½ - 3
Specific Gravity:
5.71 (Calculated)
Crystal System:
Triclinic
Member of:
Name:
Named on honor of Claude Levy of University of Paris VI, in recognition of his contributions to the mineralogy of complex sulfides.
Unique Identifiers
Mindat ID:
2387
Long-form identifier:
mindat:1:1:2387:6
GUID
(UUID V4):
(UUID V4):
49324190-723a-42db-87b2-78dab5934912
IMA Classification of Lévyclaudite
Approved
IMA Formula:
Pb8Cu3Sn7(Bi,Sb)3S28
First published:
1990
Classification of Lévyclaudite
2.HF.25a
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
F : With SnS and PbS archetype structure units
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
F : With SnS and PbS archetype structure units
3.1.3.1
3 : SULFOSALTS
1 : ø > 4
3 : SULFOSALTS
1 : ø > 4
6.1.19
6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
1 : Sulphostannates and other sulfides containing Sn
6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
1 : Sulphostannates and other sulfides containing Sn
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Lvc | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Lvc | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Lévyclaudite
Metallic
Transparency:
Opaque
Colour:
Grey
Streak:
Black
Hardness:
2½ - 3 on Mohs scale
Hardness:
VHN25=80 - 87 kg/mm2 - Vickers
Cleavage:
Distinct/Good
{100}
{100}
Density:
5.71 g/cm3 (Calculated)
Optical Data of Lévyclaudite
Anisotropism:
Strong anisotropism without very pronounced colors
Reflectivity:
| Wavelength | R1 | R2 | imR1 | imR2 |
|---|---|---|---|---|
| 400nm | 36.3% | 38.0% | 20.0% | 22.1% |
| 440nm | 35.0% | 36.7% | 20.1% | 21.1% |
| 470nm | 34.2% | 35.8% | 19.5% | 20.6% |
| 500nm | 33.5% | 35.0% | 18.9% | 20.1% |
| 546nm | 32.5% | 34.0% | 18.2% | 19.5% |
| 560nm | 32.2% | 33.7% | 18.1% | 19.4% |
| 589nm | 31.6% | 33.1% | 17.8% | 19.2% |
| 520nm | 31.0% | 32.7% | 17.4% | 19.0% |
| 650nm | 30.5% | 32.1% | 17.2% | 18.8% |
| 680nm | 29.9% | 31.8% | 16.9% | 18.6% |
| 700nm | 29.6% | 31.6% | 16.7% | 18.5% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 38.0%.
R1 shown in black, R2 shown in red, imR1 shown in green, imR2 shown in blue
Pleochroism:
Weak
Comments:
without visible colors, but distinct variation in reflectance values
Chemistry of Lévyclaudite
Mindat Formula:
Pb8Sn7Cu3(Bi,Sb)3S28
Crystallography of Lévyclaudite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Twinning:
Twins (only visible in X-ray photographs): mirror on {100} and 60° rotation around [013] for the tetragonal component.
Comment:
Misfit-layer compound of the cylindrite type, with a structure that results from the combination of two heavily modulated triclinic Q and H subcells with a common q wave vector and only one shared reciprocal axis (stacking direction). The Q layer, ~(Pb0.7Sb0.3S), is derived from the NaCl archetype: a = 5.8218(6), b = 5.8645(5), c = 12.1443(13) Å, α = 92.327(7), β = 78.533(9), γ = 90.019(8)°; the H layer, ~(Sn0.85Cu0.3S2), is derived from the CdI2 archetype: a = 3.6661(3), b = 6.3138(5), c = 11.9028(10) Å, α = 92.490(7), β = 90.590(8), γ = 89.986(8) Å.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.93 Å | (100) |
| 2.92 Å | (100) |
| 4.06 Å | (30) |
| 2.82 Å | (30) |
| 2.068 Å | (30) |
| 3.17 Å | (20) |
| 2.95 Å | (20) |
Comments:
Aghios Philippos, Greece. Data from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-𝑇 alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Lévyclaudite
General Appearance of Type Material:
occurs in veinlets <1 mm wide of lamellae (maximum length 300 μm) in flow texture
Place of Conservation of Type Material:
Type material is at the Ecole des Mines de Paris and at the University of Copenhagen.
Associated Minerals at Type Locality:
Reference:
Moëlo, Y., Makovicky, E., Karup-Møller, S., Cervelle, B., Maurel, C. (1990) La lévyclaudite, Pb8Sn7Cu3(Bi,Sb)3S28, une nouvelle espèce à structure incommensurable, de la série de la cylindrite. European Journal of Mineralogy: 2: 711-723.
Synonyms of Lévyclaudite
Other Language Names for Lévyclaudite
German:Lévyclaudit
Spanish:Lévyclaudita
Relationship of Lévyclaudite to other Species
Member of:
Other Members of this group:
| Abramovite | Pb2SnInBiS7 | Tric. 1 : P1 |
| Cylindrite | Pb3Sn4FeSb2S14 | Tric. 1 : P1 |
| Merelaniite | Mo4Pb4VSbS15 | Tric. 1 |
Related Minerals - Strunz-mindat Grouping
| 2.HF. | Ramosite | Pb25.7Sn8.3Mn3.4Sb6.4S56.2 |
| 2.HF.20 | Vrbaite | Hg3Tl4As8Sb2S20 |
| 2.HF.25a | Cylindrite | Pb3Sn4FeSb2S14 |
| 2.HF.25b | Franckeite | Fe2+(Pb,Sn2+)6Sn4+2Sb2S14 |
| 2.HF.25b | Potosíite | Pb6Sn3FeSb3S16 |
| 2.HF.25b | Coiraite | (Pb,Sn)12.5Sn5FeAs3S28 |
| 2.HF.25a | Abramovite | Pb2SnInBiS7 |
| 2.HF.25b v | Plumbostannite | Pb2Fe2Sn2Sb2S11 |
| 2.HF.25a | Merelaniite | Mo4Pb4VSbS15 |
| 2.HF.30 | Lengenbachite | Ag4Cu2Pb18As12S39 |
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 Lévyclaudite
mindat.org URL:
https://www.mindat.org/min-2387.html
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References for Lévyclaudite
Localities for Lévyclaudite
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.
Greece (TL) | |
| European Journal of Mineralogy (1990) +1 other reference |
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