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Mattagamite Mineral Data
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General Mattagamite Information
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 Chemical Formula: |
CoTe2 |
| Composition: |
Molecular Weight = 314.13 gm |
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Cobalt 18.76 % Co |
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Tellurium 81.24 % Te |
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______ |
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100.00 % |
| Empirical Formula: |
CoTe2 |
| Environment: |
In a small telluride zone in a massive zinc-rich stratiform deposit in Archaen volcanics. |
| IMA Status: |
Approved IMA 1973 |
| Locality: |
Mattagami Lake mines, Mattagami, Galinee Township, Abitibi Co., Quebec, Canada. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Mattagamite + Pronunciation  |
| Synonym: |
ICSD 25678 |
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IMA1972-003 |
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PDF 11-553 |
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Mattagamite Image |
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Images:
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Mattagamite Crystallography
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| Axial Ratios: |
a:b:c =0.8415:1:0.6164 |
| Cell Dimensions: |
a = 5.31, b = 6.31, c = 3.89, Z = 2; V = 130.34 Den(Calc)= 8.00 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnnm |
| X Ray Diffraction: |
By Intensity(I/Io): 2.805(1), 2.703(0.8), 2.066(0.6), |
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Physical Properties of Mattagamite
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| Color: |
Violet, Violet gray. |
| Diaphaneity: |
Opaque |
| Habit: |
Inclusions - Generally found as inclusions in other minerals. |
| Habit: |
Twinning Common - Crystals are usually twinned. |
| Hardness: |
5.5 - Knife Blade |
| Luster: |
Metallic |
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Optical Properties of Mattagamite
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| RL Anisotrophism: |
Weak, pinkish violet to grayish violet. |
| RL Color: |
Violet. |
| RL Pleochroism: |
Weak, colors from pink to cream. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Mattagamite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
50.20 |
62.20 |
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| 420 nm |
51.00 |
60.30 |
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| 440 nm |
51.80 |
58.40 |
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| 460 nm |
51.00 |
56.60 |
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| 480 nm |
49.90 |
55.60 |
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| 500 nm |
48.70 |
54.70 |
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| 520 nm |
48.20 |
54.20 |
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| 540 nm |
47.90 |
53.90 |
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| 560 nm |
47.80 |
53.90 |
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| 580 nm |
47.70 |
54.00 |
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| 600 nm |
47.80 |
54.30 |
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| 620 nm |
48.00 |
54.70 |
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| 640 nm |
48.30 |
55.20 |
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| 660 nm |
48.60 |
55.60 |
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| 680 nm |
48.90 |
56.30 |
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| 700 nm |
49.10 |
56.90 |
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Calculated Relative Intensity Colors of Mattagamite in Air
Relative
Intensity |
0% |
20% |
40% |
60% |
80% |
100% |
120% |
140% |
160% |
180% |
190% |
| R1 |
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| R2 |
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Calculated Properties of Mattagamite
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| Electron Density: |
Bulk Density (Electron Density)=6.67 gm/cc
note: Specific Gravity of Mattagamite =8.00 gm/cc.
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| Fermion Index: |
Fermion Index = 0.06
Boson Index = 0.94 |
| Photoelectric: |
PEMattagamite = 306.08 barns/electron
U=PEMattagamite x rElectron Density=2,042.28 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mattagamite is Not Radioactive |
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Mattagamite Classification
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| Dana Class: |
02.12.02.05 (02)Sulfides - Including Selenides and Tellurides |
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(02.12)where Am Bn Xp, with (m+n):p=1:2 |
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(02.12.02)Marcasite Group (Orthorhombic: Pnnm) |
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02.12.02.01 Marcasite FeS2 Pnnm 2/m 2/m 2/m |
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02.12.02.02 Ferroselite FeSe2 Pnnm 2/m 2/m 2/m |
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02.12.02.03 Frohbergite FeTe2 Pnnm 2/m 2/m 2/m |
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02.12.02.04 Hastite? CoSe2 Pnnm 2/m 2/m 2/m |
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02.12.02.05 Mattagamite CoTe2 Pnnm 2/m 2/m 2/m |
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02.12.02.06 Kullerudite NiSe2 Pnnm 2/m 2/m 2/m |
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02.12.02.07 Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m |
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02.12.02.08 Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m |
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02.12.02.09 Lollingite FeAs2 Pnnm 2/m 2/m 2/m |
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02.12.02.10 Seinajokite (Fe,Ni)(Sb,As)2 Pnnm 2/m 2/m 2/m |
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02.12.02.11 Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m |
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02.12.02.12 Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m |
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02.12.02.13 Nisbite NiSb2 Pnnm 2/m 2/m 2/m |
| Strunz Class: |
02.EB.10a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.E - Metal Sulfides, M:S � 1:2 |
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02.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc. |
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02.EB.10a Frohbergite FeTe2 Pnnm 2/m 2/m 2/m |
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02.EB.10a Hastite? CoSe2 Pnnm 2/m 2/m 2/m |
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02.EB.10a Ferroselite FeSe2 Pnnm 2/m 2/m 2/m |
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02.EB.10a Kullerudite NiSe2 Pnnm 2/m 2/m 2/m |
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02.EB.10a Mattagamite CoTe2 Pnnm 2/m 2/m 2/m |
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02.EB.10a Marcasite FeS2 Pnnm 2/m 2/m 2/m |
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Other Mattagamite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Mattagamite :
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 Mattagamite Specimen Label here :
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Mattagamite
CoTe2
Dana No: 02.12.02.05 Strunz No: 02.EB.10a
Locality:
Notes:
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