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Luzonite Mineral Data
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General Luzonite Information
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 Chemical Formula: |
Cu3AsS4 |
| Composition: |
Molecular Weight = 393.82 gm |
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Copper 48.41 % Cu |
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Arsenic 19.02 % As |
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Sulfur 32.57 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Cu3AsS4 |
| Environment: |
Low to moderate temperature hydrothermal deposits. Dimorphous with enargite. |
| IMA Status: |
Valid Species (Pre-IMA) 1874 |
| Locality: |
Mancayan, Luzon Island, Phillippines. Link to MinDat.org Location Data. |
| Name Origin: |
Named after the locality |
| Name Pronunciation: |
Luzonite  |
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Luzonite Image |
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Images:
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Images:
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Luzonite Catamarcaite
Comments: Catamarcaite (Ct) in contact with luzonite (Luz), unnamed Cu8Fe2ZnGe2S12 (un), sphalerite (Sp) and fine-grained chalcocite - covellite (Cc/Cv). (CanMin v44:1481).
Location: Bornite-rich ore from old dumps near the La Rosario vein, Capillitas epithermal deposit, Catamarca Province, Argentina.
Scale: See Image.
© Canadian Mineralogist |
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Luzonite Crystallography
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| Axial Ratios: |
a:c = 1:1.97826 |
| Cell Dimensions: |
a = 5.29, c = 10.465, Z = 2; V = 292.85 Den(Calc)= 4.47 |
| Crystal System: |
Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: I 42m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.046(1), 1.855(0.9), 1.592(0.7), |
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Physical Properties of Luzonite
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| Cleavage: |
None |
| Color: |
Gray, Dark pink brown, Red. |
| Density: |
4.4 - 4.6, Average = 4.5 |
| Diaphaneity: |
Opaque |
| Fracture: |
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
| Habit: |
Euhedral Crystals - Occurs as well-formed crystals showing good external form. |
| Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
| Hardness: |
3.5 - Copper Penny |
| Luster: |
Metallic |
| Streak: |
black |
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Optical Properties of Luzonite
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| RL Anisotrophism: |
Strong, in greenish yellow and purplish. |
| RL Color: |
Pale brownish pink. |
| RL Pleochroism: |
Weak. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Luzonite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
26.50 |
29.20 |
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| 420 nm |
25.50 |
27.70 |
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| 440 nm |
24.50 |
26.20 |
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| 460 nm |
23.80 |
25.00 |
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| 480 nm |
23.60 |
24.60 |
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| 500 nm |
23.60 |
25.00 |
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| 520 nm |
23.90 |
26.00 |
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| 540 nm |
24.40 |
27.00 |
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| 560 nm |
25.00 |
27.90 |
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| 580 nm |
25.60 |
28.70 |
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| 600 nm |
26.20 |
29.30 |
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| 620 nm |
27.00 |
29.90 |
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| 640 nm |
27.70 |
30.30 |
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| 660 nm |
28.40 |
30.50 |
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| 680 nm |
28.90 |
30.50 |
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| 700 nm |
29.00 |
30.30 |
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Calculated Relative Intensity Colors of Luzonite in Air
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
360% |
| R1 |
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| R2 |
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Calculated Properties of Luzonite
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| Electron Density: |
Bulk Density (Electron Density)=4.18 gm/cc
note: Specific Gravity of Luzonite =4.47 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0024426672
Boson Index = 0.9975573328 |
| Photoelectric: |
PELuzonite = 36.75 barns/electron
U=PELuzonite x rElectron Density= 153.51 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Luzonite is Not Radioactive |
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Luzonite Classification
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| Dana Class: |
03.02.02.01 (03)Sulfides - Sulfosalts |
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(03.02)where z/y = 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.02.02)Luzonite Group |
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03.02.02.01 Luzonite Cu3AsS4 I 42m 4 2m |
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03.02.02.02 Famatinite Cu3SbS4 I 42m 4 2m |
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03.02.02.03 Permingeatite Cu3SbSe4 I 42m 4 2m |
| Strunz Class: |
02.KA.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.K - Sulfarsenates, Sulfantimonates |
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02.KA -Sulfarsenates with (As,Sb)S4 tetrahedra |
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02.KA.10 Briartite Cu2(Zn,Fe)GeS4 I 42m 4 2m |
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02.KA.10 Barquillite! Cu2CdGeS4 I 42m 4 2m |
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02.KA.10 Famatinite Cu3SbS4 I 42m 4 2m |
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02.KA.10 Luzonite Cu3AsS4 I 42m 4 2m |
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02.KA.10 Permingeatite Cu3SbSe4 I 42m 4 2m |
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Other Luzonite Information
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| References: |
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Luzonite :
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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Luzonite
Cu3AsS4
Dana No: 03.02.02.01 Strunz No: 02.KA.10
Locality:
Notes:
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