Babkinite Mineral Data
General Babkinite Information
Chemical Formula:
Pb2Bi2(S,Se)3
Composition:
Molecular Weight = 975.45 gm
Bismuth 42.85 % Bi
Lead 42.48 % Pb
Selenium 8.09 % Se
Sulfur 6.57 % S
______
100.00 %
Empirical Formula:
Pb2 Bi2 S2 Se
Environment:
High temperature Sn-W sulfide deposits.
IMA Status:
Approved IMA 1994 (Dana # Added)
Locality:
The Nevskoye deposit in northeastern Russia, 400 km northwest of Magadan, 25 km northwest of Omskukchan and 35 km southwest of the Dukat gold-silver deposit. Link to MinDat.org Location Data.
Name Origin:
For P. V. Babkin (1929-1977), noted Russian Geologist and the first investigator of the Nevskoye deposit.
Name Pronunciation:
Babkinite + Pronunciation
Synonym:
IMA1994-030
Babkinite Crystallography
Axial Ratios:
a:c = 1:9.44881
Cell Dimensions:
a = 4.191, c = 39.6, Z = 3; V = 602.37 Den(Calc)= 8.07
Crystal System:
Trigonal Space Group: P 3,P 3 m
X Ray Diffraction:
By Intensity(I/Io ): 3.04(1), 2.096(0.8), 1.298(0.7), 1.806(0.6), 1.233(0.6), 3.42(0.5),
Physical Properties of Babkinite
Cleavage:
{001} Perfect
Color:
Silvery gray.
Density:
8.09
Diaphaneity:
Opaque
Habit:
Aggregates - Made of numerous individual crystals or clusters.
Habit:
Platy - Sheet forms (e.g. micas).
Hardness:
2 - Gypsum
Luster:
Metallic
Streak:
gray
Optical Properties of Babkinite
Optical Data:
NCalc= 2.08 - from Gladstone-Dale relationship (KC = 0.134) where Ncalc =Dcalc *KC +1 NCalc= 2.08 - from Gladstone-Dale relationship (KC = 0.134) where Ncalc =Dmeas *KC +1
RL Anisotrophism:
Distinct.
RL Bireflectance:
Almost absent.
RL Color:
Yellowish white.
RL Pleochroism:
Weak, bluish brown tints.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Babkinite in Air
λ
R1
R 2
∑ R1 (λ)
∑ R2 (λ)
470 nm
49.70
48.50
546 nm
48.40
47.40
589 nm
47.90
46.80
650 nm
47.90
46.20
Calculated Relative Intensity Colors of Babkinite in Air
Relative Intensity
0%
20%
40%
60%
80%
100%
120%
140%
160%
180%
190%
R1
R2
Calculated Properties of Babkinite
Electron Density:
Bulk Density (Electron Density)=6.55 gm/cc note: Specific Gravity of Babkinite =8.07 gm/cc.
Fermion Index:
Fermion Index = 0.1 Boson Index = 0.9
Photoelectric:
PEBabkinite =1,659.87 barns/electronU=PEBabkinite x r Electron Density=10875.96 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Babkinite is Not Radioactive
Babkinite Classification
Dana Class:
02.06.02.08 (02) Sulfides - Including Selenides and Tellurides
(02.06) where Am Bn Xp, with (m+n):p=4:3
(02.06.02) Joseite Group (Trigonal: R-3m)
02.06.02.01 Joseite Bi4(S,Te)3 R 3 m 3 2/m
02.06.02.02 Joseite-B Bi4(S,Te)3 R 3 m 3 2/m
02.06.02.03 Ikunolite Bi4(S,Se)3 R 3 m 3 2/m
02.06.02.04 Laitakarite Bi4(Se,S)3 R 3 m 3 2/m
02.06.02.05 Pilsenite Bi4Te3 R 3 m 3 2/m
02.06.02.06 Poubaite PbBi2Se2(Te,S)2 R 3 m 3 2/m
02.06.02.07 Rucklidgeite (Bi,Pb)3Te4 R 3 m 3 2/m
02.06.02.08 Babkinite ! Pb2Bi2(S,Se)3 P 3,P 3 m Trig
Strunz Class:
02.GC.40e 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
02.G - Sulfarsenites, sulfantimonites, sulfbismuthites
02.GC -Poly-sulfarsenites
02.GC.40e Babkinite ! Pb2Bi2(S,Se)3 P 3,P 3 m Trig
Other Babkinite Information
References:
NAME( Am.Min.,Vol.81,p1513,1996) PHYS. PROP.(Am.Min.,Vol.81,p1513,1996) OPTIC PROP.(MinRec, v 28, p 219)
See Also:
Links to other databases for Babkinite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
Search for Babkinite using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Babkinite :
Ask about Babkinite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espa�ol
Print or Cut-and-Paste your Babkinite Specimen Label here :
Babkinite
Pb2Bi2(S,Se)3
Dana No: 02.06.02.08 Strunz No: 02.GC.40e
Locality:
Notes:
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.