Mineralogy Database

Luzonite Mineral Data

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General Luzonite Information

Help on Chemical  Formula: Chemical Formula: Cu3AsS4
Help on Composition: Composition: Molecular Weight = 393.82 gm
   Copper   48.41 %  Cu
   Arsenic  19.02 %  As
   Sulfur   32.57 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: Cu3AsS4
Help on Environment: Environment: Low to moderate temperature hydrothermal deposits. Dimorphous with enargite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1874
Help on Locality: Locality: Mancayan, Luzon Island, Phillippines. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality
Help on Name Pronunciation: Name Pronunciation: Luzonite Say LUZONITE

Luzonite Image

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Comments: Pinkish-brown metallic luzonite, tarnishing gray, crystalline.
Location: Chin Kuashih, Kagoshima, Taiwan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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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

Luzonite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.97826
Help on Cell Dimensions: Cell Dimensions: a = 5.29, c = 10.465, Z = 2; V = 292.85 Den(Calc)= 4.47
Help on Crystal System: Crystal System: Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: I 42m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.046(1), 1.855(0.9), 1.592(0.7),

Physical Properties of Luzonite

Help on Cleavage: Cleavage: None
Help on Color: Color: Gray, Dark pink brown, Red.
Help on Density: Density: 4.4 - 4.6, Average = 4.5
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Metallic
Help on Streak: Streak: black

Optical Properties of Luzonite

Help on RL Anisotrophism: RL Anisotrophism: Strong, in greenish yellow and purplish.
Help on RL Color: RL Color: Pale brownish pink.
Help on RL Pleochroism: RL Pleochroism: Weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Luzonite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   26.50   29.20 
 420 nm   25.50   27.70 
 440 nm   24.50   26.20 
 460 nm   23.80   25.00 
 480 nm   23.60   24.60 
 500 nm   23.60   25.00 
 520 nm   23.90   26.00 
 540 nm   24.40   27.00 
 560 nm   25.00   27.90 
 580 nm   25.60   28.70 
 600 nm   26.20   29.30 
 620 nm   27.00   29.90 
 640 nm   27.70   30.30 
 660 nm   28.40   30.50 
 680 nm   28.90   30.50 
 700 nm   29.00   30.30 
Calculated Relative Intensity Colors of Luzonite in Air
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 360%

Calculated Properties of Luzonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.18 gm/cc
note: Specific Gravity of Luzonite =4.47 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0024426672
Boson Index = 0.9975573328
Help on Photoelectric: Photoelectric: PELuzonite = 36.75 barns/electron
U=PELuzonite x rElectron Density= 153.51 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Luzonite is Not Radioactive

Luzonite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.02)where z/y = 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.02.02)Luzonite Group Luzonite Cu3AsS4 I 42m 4 2m Famatinite Cu3SbS4 I 42m 4 2m Permingeatite Cu3SbSe4 I 42m 4 2m
Help on  Strunz Class: Strunz Class: 02.KA.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.K - Sulfarsenates, Sulfantimonates
  02.KA -Sulfarsenates with (As,Sb)S4 tetrahedra
02.KA.10 Briartite Cu2(Zn,Fe)GeS4 I 42m 4 2m
02.KA.10 Barquillite! Cu2CdGeS4 I 42m 4 2m
02.KA.10 Famatinite Cu3SbS4 I 42m 4 2m
02.KA.10 Luzonite Cu3AsS4 I 42m 4 2m
02.KA.10 Permingeatite Cu3SbSe4 I 42m 4 2m

Other Luzonite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: 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

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Dana No: Strunz No: 02.KA.10





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