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Hastite Mineral Data
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General Hastite Information
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 Chemical Formula: |
CoSe2 |
| Composition: |
Molecular Weight = 216.85 gm |
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Cobalt 27.18 % Co |
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Selenium 72.82 % Se |
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______ |
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100.00 % |
| Empirical Formula: |
CoSe2 |
| Environment: |
In hydrothermal veins. Hastite (1955) was shown to be ferroselite |
| IMA Status: |
Discredited IMA 2008 - Valid Species (Pre-IMA) 1955 |
| Locality: |
In Germany, from the Trogtal quarry, near Lautenthal, in the upper Harz. Link to MinDat.org Location Data. |
| Name Origin: |
For Dr. P.F. Hast, mining engineer. |
| Name Pronunciation: |
Hastite  |
| Synonym: |
ICSD 42540 |
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PDF 10-408 |
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Hastite Crystallography
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| Axial Ratios: |
a:b:c =0.7438:1:1.1818 |
| Cell Dimensions: |
a = 3.6, b = 4.84, c = 5.72, Z = 2; V = 99.67 Den(Calc)= 7.23 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnnm |
| X Ray Diffraction: |
By Intensity(I/Io): 1.9(1), 2.5(1), 2.6(1), |
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Physical Properties of Hastite
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| Color: |
Brownish red, Red violet. |
| Density: |
7.22 |
| Diaphaneity: |
Opaque |
| Hardness: |
6 - Orthoclase |
| Luster: |
Metallic |
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Optical Properties of Hastite
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| RL Anisotrophism: |
Strong. |
| RL Pleochroism: |
Strong, especially in oil. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Hastite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
46.60 |
47.20 |
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| 420 nm |
46.40 |
47.70 |
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| 440 nm |
46.20 |
48.20 |
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| 460 nm |
46.10 |
48.80 |
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| 480 nm |
46.00 |
49.60 |
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| 500 nm |
46.20 |
50.40 |
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| 520 nm |
46.60 |
51.20 |
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| 540 nm |
46.90 |
52.20 |
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| 560 nm |
47.40 |
53.30 |
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| 580 nm |
47.90 |
54.20 |
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| 600 nm |
48.50 |
55.40 |
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| 620 nm |
49.10 |
56.40 |
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| 640 nm |
49.70 |
57.20 |
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| 660 nm |
50.40 |
58.00 |
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| 680 nm |
51.00 |
58.60 |
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| 700 nm |
51.40 |
59.00 |
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Calculated Relative Intensity Colors of Hastite 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 Hastite
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| Electron Density: |
Bulk Density (Electron Density)=6.33 gm/cc
note: Specific Gravity of Hastite =7.23 gm/cc.
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| Fermion Index: |
Fermion Index = 0.05
Boson Index = 0.95 |
| Photoelectric: |
PEHastite = 68.46 barns/electron
U=PEHastite x rElectron Density= 433.64 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hastite is Not Radioactive |
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Hastite Classification
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| Dana Class: |
02.12.02.04 (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 Hastite 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 Hastite :
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
15 - WWW-MINCRYST
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Hastite
CoSe2
Dana No: 02.12.02.04 Strunz No: 02.EB.10a
Locality:
Notes:
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