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Weissite Mineral Data
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General Weissite Information
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 Chemical Formula: |
Cu1.9Te |
| Composition: |
Molecular Weight = 248.34 gm |
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Copper 48.62 % Cu |
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Tellurium 51.38 % Te |
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______ |
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100.00 % |
| Empirical Formula: |
Cu1.9Te |
| Environment: |
Telluride ore deposits. |
| IMA Status: |
Valid Species (Pre-IMA) 1927 |
| Locality: |
Good Hope and Mammoth Chimney Mines at Vulcan, Gunnison County, Colorado, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Louis Weiss, owner of the Good Hope mine and discoverer of rickardite. |
| Name Pronunciation: |
Weissite  |
| Synonym: |
ICSD 42158 |
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PDF 45-1285 |
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Weissite Image |
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Images:
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Weissite Crystallography
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| Axial Ratios: |
a:c = 1:2.57234 |
| Cell Dimensions: |
a = 8.432, c = 21.69, Z = 24; V = 1,335.52 Den(Calc)= 7.41 |
| Crystal System: |
Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 6/mmm |
| X Ray Diffraction: |
By Intensity(I/Io): 2.09(1), 2.01(0.7), 3.61(0.7), |
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Physical Properties of Weissite
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| Cleavage: |
None |
| Color: |
Bluish black, Dark blue black, Black. |
| Density: |
6 |
| Diaphaneity: |
Opaque |
| Fracture: |
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
| Hardness: |
3 - Calcite |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Metallic |
| Magnetism: |
Nonmagnetic |
| Streak: |
black |
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Optical Properties of Weissite
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| RL Anisotrophism: |
Distinct. |
| RL Pleochroism: |
Distinct. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Weissite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
40.30 |
41.60 |
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| 420 nm |
39.80 |
41.30 |
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| 440 nm |
38.90 |
40.60 |
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| 460 nm |
37.90 |
39.60 |
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| 480 nm |
36.90 |
38.40 |
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| 500 nm |
35.90 |
37.10 |
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| 520 nm |
34.80 |
35.90 |
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| 540 nm |
33.70 |
34.90 |
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| 560 nm |
32.60 |
34.00 |
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| 580 nm |
31.50 |
33.10 |
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| 600 nm |
30.50 |
32.50 |
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| 620 nm |
29.60 |
32.00 |
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| 640 nm |
28.90 |
31.60 |
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| 660 nm |
28.10 |
31.20 |
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| 680 nm |
27.30 |
30.80 |
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| 700 nm |
26.40 |
30.20 |
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Calculated Relative Intensity Colors of Weissite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
240% |
270% |
290% |
| R1 |
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| R2 |
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Calculated Properties of Weissite
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| Electron Density: |
Bulk Density (Electron Density)=6.39 gm/cc
note: Specific Gravity of Weissite =7.41 gm/cc.
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| Fermion Index: |
Fermion Index = 0.04
Boson Index = 0.96 |
| Photoelectric: |
PEWeissite = 206.37 barns/electron
U=PEWeissite x rElectron Density=1,318.97 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Weissite is Not Radioactive |
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Weissite Classification
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| Dana Class: |
02.04.08.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.04)where Am Bn Xp, with (m+n):p=2:1 |
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(02.04.08)Dana Group |
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02.04.08.01 Weissite Cu1.9Te P 6/mmm 6/m 2/m 2/m |
| Strunz Class: |
02.BA.20b 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.BA -With Cu, Ag, Au |
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02.BA.20b Weissite Cu1.9Te P 6/mmm 6/m 2/m 2/m |
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Other Weissite Information
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| References: |
NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Weissite :
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 Weissite Specimen Label here :
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Weissite
Cu1.9Te
Dana No: 02.04.08.01 Strunz No: 02.BA.20b
Locality:
Notes:
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