Mineralogy Database

Eskimoite Mineral Data

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General Eskimoite Information

Help on Chemical  Formula: Chemical Formula: Ag7Pb10Bi15S36
Help on Composition: Composition: Molecular Weight = 7,116.16 gm
   Silver   10.61 %  Ag
   Bismuth  44.05 %  Bi
   Lead     29.12 %  Pb
   Sulfur   16.22 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: Ag7Pb10Bi15S36
Help on Environment: Environment: In a cryolite deposit.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Ivigutut, Greenland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the Eskimos, the natives of Greenland.
Help on Name Pronunciation: Name Pronunciation: Eskimoite + Pronunciation Say ESKIMOITE

Eskimoite Image

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Comments: Gray metallic eskimoite in quartz.
Location: Manhattan, Nye County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Eskimoite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =7.3643:1:3.2826
Help on Cell Dimensions: Cell Dimensions: a = 30.194, b = 4.1, c = 13.459, Z = 1; beta = 93.35° V = 1,663.32 Den(Calc)= 7.10
Help on Crystal System: Crystal System: Monoclinic - Domatic H-M Symbol (m) Space Group: Am
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.36(1), 2.87(0.6), 2.96(0.5),

Physical Properties of Eskimoite

Help on Color: Color: Black, Gray.
Help on Density: Density: 7.1
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Lamellar - Thin laminae producing a lamellar structure.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Metallic

Optical Properties of Eskimoite

Help on RL Anisotrophism: RL Anisotrophism: Distinct to strong, light gray to steel bluish black.
Help on RL Color: RL Color: Galena white.
Help on RL Pleochroism: RL Pleochroism: Absent in air, absent to weak in oil.

Calculated Properties of Eskimoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.93 gm/cc
note: Specific Gravity of Eskimoite =7.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEEskimoite =1,414.72 barns/electron
U=PEEskimoite x rElectron Density=8,384.38 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Eskimoite is Not Radioactive

Eskimoite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.06)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.06.02)Dana Group Eskimoite Ag7Pb10Bi15S36 Am m
Help on  Strunz Class: Strunz Class: 02.JB.40b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.J - Sulfosalts of PbS Archetype
  02.JB -Galena derivatives, with Pb
02.JB.40b Aschamalmite Pb6Bi2S9 C 2/m 2/m
02.JB.40b Eskimoite Ag7Pb10Bi15S36 Am m
02.JB.40b Heyrovskyite Pb10AgBi5S18 C mcm 2/m 2/m 2/m

Other Eskimoite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Eskimoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 02.JB.40b





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