Mineralogy Database

Gortdrumite Mineral Data

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General Gortdrumite Information

Help on Chemical  Formula: Chemical Formula: (Cu,Fe)6Hg2S5
Help on Composition: Composition: Molecular Weight = 939.71 gm
   Iron      2.38 %  Fe
   Copper   37.87 %  Cu
   Mercury  42.69 %  Hg
   Sulfur   17.06 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Cu5.6Fe2+0.4Hg2S5
Help on Environment: Environment: Admixed with other sulfide minerals in a vein cutting dolomitized limestone. Estimated Tmax < 200 deg. C.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Gortdrum deposit, Tipperary, Eire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Gortdrumite + Pronunciation Say GORTDRUMITE
 

Gortdrumite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.8934:1:3.0506
Help on Cell Dimensions: Cell Dimensions: a = 14.958, b = 7.9, c = 24.1, Z = 12; V = 2,847.85 Den(Calc)= 6.57
Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.58(1), 3.38(0.7), 2.88(0.5),
 

Physical Properties of Gortdrumite

Help on Color: Color: Lead gray, Black.
Help on Density: Density: 6.8
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Metallic
 

Optical Properties of Gortdrumite

Help on RL Anisotrophism: RL Anisotrophism: Strong, with colors from grayish white with a bluish tint to blue.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Gortdrumite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   28.00   31.40 
   
 420 nm   28.10   31.40 
 440 nm   28.00   31.30 
 460 nm   27.80   31.20 
 480 nm   27.60   31.10 
 500 nm   27.40   31.10 
 520 nm   27.00   30.80 
 540 nm   26.70   30.50 
 560 nm   26.20   30.00 
 580 nm   25.90   29.50 
 600 nm   25.60   29.00 
 620 nm   25.40   28.60 
 640 nm   25.30   28.40 
 660 nm   25.30   28.20 
 680 nm   25.30   28.10 
 700 nm   25.20   28.00 
Calculated Relative Intensity Colors of Gortdrumite in Air
Relative
Intensity
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 340%
R1                      
R2                      
 

Calculated Properties of Gortdrumite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.77 gm/cc
note: Specific Gravity of Gortdrumite =6.57 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.13
Boson Index = 0.87
Help on Photoelectric: Photoelectric: PEGortdrumite = 707.69 barns/electron
U=PEGortdrumite x rElectron Density=4,084.94 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gortdrumite is Not Radioactive
 

Gortdrumite Classification

Help on  Dana Class: Dana Class: 02.16.14.01 (02)Sulfides - Including Selenides and Tellurides
  (02.16)with miscellaneous formulae
  (02.16.14)Dana Group
 
02.16.14.01 Gortdrumite (Cu,Fe)6Hg2S5 Unk Ortho
Help on  Strunz Class: Strunz Class: 02.BD.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)
  02.BD -With Hg, Tl
 
02.BD.10 Gortdrumite (Cu,Fe)6Hg2S5 Unk Ortho
 

Other Gortdrumite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Gortdrumite :
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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Print or Cut-and-Paste your Gortdrumite Specimen Label here :

Gortdrumite

(Cu,Fe)6Hg2S5
Dana No: 02.16.14.01 Strunz No: 02.BD.10
Locality:

 

Notes:

 

 
   
 


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