Eskimoite Mineral Data

General Eskimoite Information

Chemical Formula:

Ag7Pb10Bi15S36

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 %

Empirical Formula:

Ag₇Pb₁₀Bi₁₅S₃₆

Environment:

In a cryolite deposit.

IMA Status:

Approved IMA 1977

Locality:

Ivigutut, Greenland. Link to MinDat.org Location Data.

Name Origin:

Named for the Eskimos, the natives of Greenland.

Name Pronunciation:

Eskimoite + Pronunciation

Eskimoite Image

Images:

Eskimoite

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

Eskimoite Crystallography

Axial Ratios:

a:b:c =7.3643:1:3.2826

Cell Dimensions:

a = 30.194, b = 4.1, c = 13.459, Z = 1; beta = 93.35° V = 1,663.32 Den(Calc)= 7.10

Crystal System:

Monoclinic - DomaticH-M Symbol (m) Space Group: Am

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.36(1), 2.87(0.6), 2.96(0.5),

Physical Properties of Eskimoite

Color:

Black, Gray.

Density:

7.1

Diaphaneity:

Opaque

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Lamellar - Thin laminae producing a lamellar structure.

Hardness:

4 - Fluorite

Luster:

Metallic

Optical Properties of Eskimoite

RL Anisotrophism:

Distinct to strong, light gray to steel bluish black.

RL Color:

Galena white.

RL Pleochroism:

Absent in air, absent to weak in oil.

Calculated Properties of Eskimoite

Electron Density:

Bulk Density (Electron Density)=5.93 gm/cc
note: Specific Gravity of Eskimoite =7.10 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_Eskimoite=1,414.72 barns/electron
U=PE_Eskimoite x rElectron Density=8,384.38 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Eskimoite is Not Radioactive

Eskimoite Classification

Dana Class:

03.06.02.01 (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

03.06.02.01 Eskimoite Ag7Pb10Bi15S36 Am m

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

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)

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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Ask about Eskimoite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
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Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Eskimoite Specimen Label here :

Eskimoite

Ag7Pb10Bi15S36
Dana No: 03.06.02.01 Strunz No: 02.JB.40b
Locality:

Notes: