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Gortdrumite Mineral Data
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General Gortdrumite Information
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 Chemical Formula: |
(Cu,Fe)6Hg2S5 |
| Composition: |
Molecular Weight = 939.71 gm |
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Iron 2.38 % Fe |
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Copper 37.87 % Cu |
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Mercury 42.69 % Hg |
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Sulfur 17.06 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Cu5.6Fe2+0.4Hg2S5 |
| Environment: |
Admixed with other sulfide minerals in a vein cutting dolomitized limestone. Estimated Tmax < 200 deg. C. |
| IMA Status: |
Approved IMA 1983 |
| Locality: |
Gortdrum deposit, Tipperary, Eire. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Gortdrumite + Pronunciation  |
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Gortdrumite Crystallography
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| Axial Ratios: |
a:b:c =1.8934:1:3.0506 |
| Cell Dimensions: |
a = 14.958, b = 7.9, c = 24.1, Z = 12; V = 2,847.85 Den(Calc)= 6.57 |
| Crystal System: |
Orthorhombic Space Group: Unk |
| X Ray Diffraction: |
By Intensity(I/Io): 4.58(1), 3.38(0.7), 2.88(0.5), |
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Physical Properties of Gortdrumite
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| Color: |
Lead gray, Black. |
| Density: |
6.8 |
| Diaphaneity: |
Opaque |
| Habit: |
Anhedral Grains - Granular minerals without the expression of crystal shapes |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Hardness: |
3.5-4 - Copper Penny-Fluorite |
| Luster: |
Metallic |
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Optical Properties of Gortdrumite
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| RL Anisotrophism: |
Strong, with colors from grayish white with a bluish tint to blue. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Gortdrumite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
28.00 |
31.40 |
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| 420 nm |
28.10 |
31.40 |
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| 440 nm |
28.00 |
31.30 |
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| 460 nm |
27.80 |
31.20 |
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| 480 nm |
27.60 |
31.10 |
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| 500 nm |
27.40 |
31.10 |
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| 520 nm |
27.00 |
30.80 |
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| 540 nm |
26.70 |
30.50 |
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| 560 nm |
26.20 |
30.00 |
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| 580 nm |
25.90 |
29.50 |
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| 600 nm |
25.60 |
29.00 |
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| 620 nm |
25.40 |
28.60 |
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| 640 nm |
25.30 |
28.40 |
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| 660 nm |
25.30 |
28.20 |
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| 680 nm |
25.30 |
28.10 |
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| 700 nm |
25.20 |
28.00 |
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Calculated Relative Intensity Colors of Gortdrumite in Air
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
340% |
| R1 |
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| R2 |
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Calculated Properties of Gortdrumite
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| Electron Density: |
Bulk Density (Electron Density)=5.77 gm/cc
note: Specific Gravity of Gortdrumite =6.57 gm/cc.
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| Fermion Index: |
Fermion Index = 0.13
Boson Index = 0.87 |
| Photoelectric: |
PEGortdrumite = 707.69 barns/electron
U=PEGortdrumite x rElectron Density=4,084.94 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gortdrumite is Not Radioactive |
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Gortdrumite Classification
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| Dana Class: |
02.16.14.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.16)with miscellaneous formulae |
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(02.16.14)Dana Group |
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02.16.14.01 Gortdrumite (Cu,Fe)6Hg2S5 Unk Ortho |
| Strunz Class: |
02.BD.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1) |
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02.BD -With Hg, Tl |
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02.BD.10 Gortdrumite (Cu,Fe)6Hg2S5 Unk Ortho |
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Other Gortdrumite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| 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 :
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Gortdrumite
(Cu,Fe)6Hg2S5
Dana No: 02.16.14.01 Strunz No: 02.BD.10
Locality:
Notes:
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