Luzonite Mineral Data

General Luzonite Information

Chemical Formula:

Cu3AsS4

Composition:

Molecular Weight = 393.82 gm

Copper 48.41 % Cu

Arsenic 19.02 % As

Sulfur 32.57 % S

______

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

Luzonite Image

Images:

Luzonite

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

Images:

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

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 - ScalenohedralH-M Symbol (4 2m) Space Group: I 42m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.046(1), 1.855(0.9), 1.592(0.7),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
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Marumo F , Nowacki W , Zeitschrift fur Kristallographie , 124 (1967) p.1-8, A refinement of the crystal structure of luzonite, Cu3AsS4, Locality: Cerro de Pasco, Peru

Physical Properties of Luzonite

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

Optical Properties of Luzonite

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	∑ 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**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	360%
R₁
R₂

Calculated Properties of Luzonite

Electron Density:

Bulk Density (Electron Density)=4.18 gm/cc
note: Specific Gravity of Luzonite =4.47 gm/cc.

Fermion Index:

Fermion Index = 0.0024426672
Boson Index = 0.9975573328

Photoelectric:

PE_Luzonite= 36.75 barns/electron
U=PE_Luzonite x rElectron Density= 153.51 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Luzonite is Not Radioactive

Luzonite Classification

Dana Class:

03.02.02.01 (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

03.02.02.01 Luzonite Cu3AsS4 I 42m 4 2m

03.02.02.02 Famatinite Cu3SbS4 I 42m 4 2m

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

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

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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Ask about Luzonite here :
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Print or Cut-and-Paste your Luzonite Specimen Label here :

Luzonite

Cu3AsS4
Dana No: 03.02.02.01 Strunz No: 02.KA.10
Locality:

Notes: