Babkinite
A valid IMA mineral species
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About Babkinite
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
IMA Classification of Babkinite
Approved
Approval year:
1994
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 for Standard |
|---|---|---|
| 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). 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
Element Weights:
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-? 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:
Synonyms of Babkinite
Other Language Names for Babkinite
Relationship of Babkinite to other Species
Member of:
Other Members of Aleksite Group:
| Aleksite | PbBi2Te2S2 | Trig. 3m(32/m) : P31m |
| Clogauite | PbBi4Te4S3 | Trig. 3m(32/m) : P3m1 |
| Hitachiite | Pb5Bi2Te2S6 | Trig. 3m : P3m1 |
| Kochkarite | PbBi4Te7 | Trig. |
| Poubaite | PbBi2(Se,Te,S)4 | Trig. 3m(32/m) : R3m |
| Rucklidgeite | PbBi2Te4 | Trig. 3m(32/m) : R3m |
| Saddlebackite | Pb2Bi2Te2S3 | Hex. |
Related Minerals - Strunz-mindat Grouping
| 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.40d | Saddlebackite | Pb2Bi2Te2S3 |
| 2.GC.40c | Rucklidgeite | PbBi2Te4 |
| 2.GC.40 | Clogauite | PbBi4Te4S3 |
| 2.GC.40b | Kochkarite | PbBi4Te7 |
| 2.GC.40c | Poubaite | PbBi2(Se,Te,S)4 |
| 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
Showing 8 localities.
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.
Kosovo | |
| Kołodziejczyk et al. (2015) |
Poland | |
| Mil et al. (2026) |
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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Falun mine, Falun, Dalarna County, Sweden