Mineralogy Database

Polhemusite Mineral Data

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General Polhemusite Information

Help on Chemical  Formula: Chemical Formula: (Zn,Hg)S
Help on Composition: Composition: Molecular Weight = 131.26 gm
   Zinc     37.36 %  Zn
   Mercury  38.21 %  Hg
   Sulfur   24.43 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: Zn0.75Hg0.25S
Help on Environment: Environment: As part of a replacement deposit of stibnite.
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: B and B deposit, Big Creek district, Valley County, Idaho, USA Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Clyde Polhemus Ross, American economic geologist.
Help on Name Pronunciation: Name Pronunciation: Polhemusite + Pronunciation Say POLHEMUSITE

Polhemusite Image

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Comments: B&W polished section (PPL) image (green filter) of aggregates of polhemusite (P) in stibnite (S) with associated cinnabar (C) and quartz (Q). (AmMin, v63:1153).
Location: Mercury-bearing antimony ore from the B and B deposit, Big Creek district, Valley County, Idaho. Scale: Scale Bar 0.5 mm.
© American Mineralogist

Polhemusite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.6923
Help on Cell Dimensions: Cell Dimensions: a = 8.71, c = 14.74, Z = 24; V = 1,118.24 Den(Calc)= 4.68
Help on Crystal System: Crystal System: Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: P 4/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.08(1), 1.888(0.8), 3.16(0.7),

Physical Properties of Polhemusite

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: Black.
Help on Density: Density: 4.93
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Adamantine - Resinous

Optical Properties of Polhemusite

Help on RL Anisotrophism: RL Anisotrophism: Moderate in air, strong in oil.
Help on RL Color: RL Color: Gray, with intense red internal reflections.
Help on RL Pleochroism: RL Pleochroism: Very slightly brownish gray to slightly lavender-gray.

Calculated Properties of Polhemusite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.17 gm/cc
note: Specific Gravity of Polhemusite =4.68 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.13
Boson Index = 0.87
Help on Photoelectric: Photoelectric: PEPolhemusite = 628.11 barns/electron
U=PEPolhemusite x rElectron Density=2,620.28 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Polhemusite is Not Radioactive

Polhemusite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.08)where Am Bn Xp, with (m+n):p=1:1
  (02.08.03)Dana Group Polhemusite (Zn,Hg)S P 4/n 4/m
Help on  Strunz Class: Strunz Class: 02.CB.05c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.C - Metal Sulfides, M:S = 1:1 (and similar)
  02.CB -With Zn, Fe, Cu, Ag, Au, etc
02.CB.05c Polhemusite (Zn,Hg)S P 4/n 4/m

Other Polhemusite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Polhemusite :
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.CB.05c





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