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Paxite Mineral Data
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General Paxite Information
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 Chemical Formula: |
CuAs2 |
| Composition: |
Molecular Weight = 213.39 gm |
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Copper 29.78 % Cu |
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Arsenic 70.22 % As |
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______ |
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100.00 % |
| Empirical Formula: |
CuAs2 |
| Environment: |
Hydrothermal calcite veins. |
| IMA Status: |
Approved IMA 1961 |
| Locality: |
Cerny Dul, Czech Republic. Link to MinDat.org Location Data. |
| Name Origin: |
Named from the Latin "pax" for peace. |
| Name Pronunciation: |
Paxite  |
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Paxite Crystallography
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| Axial Ratios: |
a:b:c =1.1424:1:1.5816 |
| Cell Dimensions: |
a = 5.839, b = 5.111, c = 8.084, Z = 4; beta = 99.7° V = 237.80 Den(Calc)= 5.96 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c |
| X Ray Diffraction: |
By Intensity(I/Io): 3.164(1), 3.633(0.8), 2.772(0.7), |
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Physical Properties of Paxite
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| Cleavage: |
{???} Perfect |
| Color: |
Black, Black, Steel gray. |
| Density: |
5.3 |
| Diaphaneity: |
Opaque |
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
| Hardness: |
3.5-4 - Copper Penny-Fluorite |
| Luster: |
Metallic |
| Streak: |
black |
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Optical Properties of Paxite
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| RL Anisotrophism: |
Very strong, in light gray-green and dark brown with violet tint. |
| RL Color: |
Light grayish white. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Paxite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
46.40 |
48.20 |
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| 420 nm |
45.80 |
48.40 |
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| 440 nm |
45.20 |
48.60 |
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| 460 nm |
44.80 |
48.40 |
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| 480 nm |
44.60 |
48.00 |
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| 500 nm |
44.60 |
48.50 |
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| 520 nm |
44.50 |
49.20 |
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| 540 nm |
44.20 |
49.50 |
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| 560 nm |
43.80 |
49.40 |
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| 580 nm |
43.50 |
49.10 |
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| 600 nm |
43.40 |
48.90 |
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| 620 nm |
43.50 |
48.80 |
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| 640 nm |
43.70 |
48.60 |
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| 660 nm |
43.80 |
48.30 |
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| 680 nm |
43.70 |
47.90 |
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| 700 nm |
43.30 |
47.60 |
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Calculated Relative Intensity Colors of Paxite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
200% |
| R1 |
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| R2 |
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Calculated Properties of Paxite
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| Electron Density: |
Bulk Density (Electron Density)=5.31 gm/cc
note: Specific Gravity of Paxite =5.96 gm/cc.
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| Fermion Index: |
Fermion Index = 0
Boson Index = 1 |
| Photoelectric: |
PEPaxite = 64.90 barns/electron
U=PEPaxite x rElectron Density= 344.41 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Paxite is Not Radioactive |
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Paxite Classification
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| Dana Class: |
02.12.05.02 (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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(02.12.05)Dana Group |
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02.12.05.01 Pararammelsbergite NiAs2 Pbma 2/m 2/m 2/m |
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02.12.05.02 Paxite CuAs2 P 21/c 2/m |
| Strunz Class: |
02.EB.20 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.20 Arsenopyrite FeAsS P 21/c 2/m |
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02.EB.20 Gudmundite FeSbS P 21/n 2/m |
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02.EB.20 Ruarsite RuAsS P 21/c 2/m |
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02.EB.20 Paxite CuAs2 P 21/c 2/m |
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02.EB.20 Osarsite (Os,Ru)AsS P 21/c 2/m |
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Other Paxite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Paxite :
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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Paxite
CuAs2
Dana No: 02.12.05.02 Strunz No: 02.EB.20
Locality:
Notes:
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