Babkinite
A valid IMA mineral species
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Formula:
Pb2Bi2(S,Se)3
Colour:
Silvery grey
Lustre:
Metallic
Hardness:
2
Specific Gravity:
8.096 (Calculated)
Crystal System:
Trigonal
Member of:
Name:
For Petr Vasil'evich Babkin (1929-1977), noted Russian Geologist and the first investigator of the Nevskoye deposit.
Unique Identifiers
Mindat ID:
6812
Long-form identifier:
mindat:1:1:6812:9
GUID
(UUID V4):
(UUID V4):
a9d3d897-6190-4f53-a2c4-771bd1f64274
IMA Classification of Babkinite
Approved
First published:
1996
Classification of Babkinite
2.GC.40e
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
C : Poly-sulfarsenites
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
C : Poly-sulfarsenites
2.6.3.
2 : SULFIDES
6 : AmBnXp, with (m+n):p = 4:3
2 : SULFIDES
6 : AmBnXp, with (m+n):p = 4:3
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 |
---|---|---|
Bbk | 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 Babkinite
Metallic
Transparency:
Opaque
Colour:
Silvery grey
Streak:
Grey
Hardness:
2 on Mohs scale
Hardness:
VHN10=71 - 91 kg/mm2 - Vickers
Cleavage:
Perfect
on {0001}
on {0001}
Density:
8.096 g/cm3 (Calculated)
Optical Data of Babkinite
Anisotropism:
Distinct
Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
400nm | 53.1% | 51.3% |
420nm | 51.9% | 50.7% |
440nm | 51.0% | 49.6% |
460nm | 49.9% | 48.7% |
480nm | 49.5% | 48.6% |
500nm | 49.2% | 48.5% |
520nm | 48.7% | 47.8% |
540nm | 48.6% | 47.5% |
546nm | 48.4% | 47.4% |
560nm | 48.2% | 47.3% |
580nm | 48.0% | 47.0% |
589nm | 47.9% | 46.8% |
600nm | 48.0% | 46.5% |
620nm | 48.1% | 46.5% |
640nm | 47.8% | 46.1% |
650nm | 47.9% | 46.2% |
660nm | 48.1% | 46.5% |
680nm | 47.8% | 46.2% |
700nm | 47.8% | 46.7% |
720nm | 47.8% | 46.8% |
740nm | 47.8% | 46.8% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 53.1%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White with yellowish tint
Pleochroism:
Weak
Comments:
in pale bluish brown tints
Chemistry of Babkinite
Mindat Formula:
Pb2Bi2(S,Se)3
Elements listed:
Crystallography of Babkinite
Crystal System:
Trigonal
Cell Parameters:
a = 4.191(2) Å, c = 39.60(3) Å
Ratio:
a:c = 1 : 9.449
Unit Cell V:
602.37 ų (Calculated from Unit Cell)
Z:
3
Comment:
Space group P-31m or P-3.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.42 Å | (50) |
3.04 Å | (100) |
2.096 Å | (80) |
1.806 Å | (60) |
1.725 Å | (50) |
1.298 Å | (70) |
1.233 Å | (60) |
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 Babkinite
General Appearance of Type Material:
As thin tablets, in aggregates, to 2 mm across.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, p806/1.
Geological Setting of Type Material:
In a hydrothermal deposit in sediments, near their contact with a granite intrusion.
Associated Minerals at Type Locality:
Reference:
Bryzgalov, I.A., Spiridonov, E.M., Petrova, I.V. and Sakharova, M.S. (1996): Babkinite Pb2Bi2(S, Se)3 – a new mineral. Doklady Akademii Nauk SSSR, 346(5), 656-659.
Synonyms of Babkinite
Other Language Names for Babkinite
Relationship of Babkinite to other Species
Member of:
Other Members of this group:
Aleksite | PbBi2Te2S2 | Trig. 3m (3 2/m) : P3 1m |
Kochkarite | PbBi4Te7 | Trig. |
Poubaite | PbBi2(Se,Te,S)4 | Trig. 3m (3 2/m) : R3m |
Rucklidgeite | PbBi2Te4 | Trig. 3m (3 2/m) : R3m |
Saddlebackite | Pb2Bi2Te2S3 | Hex. |
Related Minerals - Strunz-mindat Grouping
2.GC. | Clogauite | PbBi4Te4S3 |
2.GC.05 | Hatchite | AgTlPbAs2S5 |
2.GC.05 | Wallisite | (Cu,Ag)TlPbAs2S5 |
2.GC.10 | Sinnerite | Cu6As4S9 |
2.GC.15 | Watanabeite | Cu4(As,Sb)2S5 |
2.GC.20 | Simonite | TlHgAs3S6 |
2.GC.25 | Quadratite | Ag(Cd,Pb)AsS3 |
2.GC.25 | Manganoquadratite | AgMnAsS3 |
2.GC.30 | Smithite | AgAsS2 |
2.GC.35 | Trechmannite | AgAsS2 |
2.GC.35 | Debattistiite | Ag9Hg0.5As6S12Te2 |
2.GC.40a | Aleksite | PbBi2Te2S2 |
2.GC.40b | Kochkarite | PbBi4Te7 |
2.GC.40c | Poubaite | PbBi2(Se,Te,S)4 |
2.GC.40c | Rucklidgeite | PbBi2Te4 |
2.GC.40d | Saddlebackite | Pb2Bi2Te2S3 |
2.GC.45 | Tvalchrelidzeite | Hg3SbAsS3 |
2.GC.50 | Mutnovskite | Pb4As2S6ICl |
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 Babkinite
mindat.org URL:
https://www.mindat.org/min-6812.html
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References for Babkinite
Localities for Babkinite
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Kosovo | |
| Kołodziejczyk et al. (2015) |
Russia | |
| Буханова (2018) |
| Bryzgalov et al. (1996) +1 other reference |
Sweden | |
| Färber (n.d.) |
USA | |
| Mankins (2022) |
Mankins (2022) | |
Mankins (2022) |
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