Luzonite Mineral Data +

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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
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
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
X Ray Diffraction:	By Intensity(I/Io): 3.046(1), 1.855(0.9), 1.592(0.7),
Crystal Structure: Mouse drag1 - LMB Manipulate Structure drag2 - RMB Resize/Rotate Keyboard S - Stereo Pair on/off H - Help Screen I - Data Info A - Atoms On/Off P - Polyhedra On/Off B - Bonds On/Off Help on Above	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
Diaphaniety:	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:	relectron=4.18 gm/cc note: rLuzonite =4.47 gm/cc.
Fermion Index	Fermion Index = 0.00244 Boson Index = 0.99756
Photoelectric:	PELuzonite = 36.75 barns/electron U=PELuzonite x relectron= 153.51 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Luzonite is Not Radioactive
Luzonite Classification
Dana Class:	3.2.2.1 (3)Sulfides - Sulfosalts
	(3.2)where z/y = 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
	(3.2.2)Dana Group
	3.2.2.1 Luzonite Cu3AsS4 I 42m 4 2m
	3.2.2.2 Famatinite Cu3SbS4 I 42m 4 2m
	3.2.2.3 Permingeatite Cu3SbSe4 I 42m 4 2m
Strunz Class:	II/C.06-10 II - Sulfides and sulphosalts
	II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1
	II/C.06 - Stannite group
	II/C.06-10 Luzonite Cu3AsS4 I 42m 4 2m
	II/C.06-20 Famatinite Cu3SbS4 I 42m 4 2m
	II/C.06-30 Permingeatite Cu3SbSe4 I 42m 4 2m
	II/C.06-40 Briartite Cu2(Zn,Fe)GeS4 I 42m 4 2m
	II/C.06-45 Barquillite! Cu2CdGeS4 I 42m 4 2m
	II/C.06-50 Kuramite Cu3SnS4 I 42m 4 2m
	II/C.06-60 Stannite Cu2FeSnS4 I 42m 4 2m
	II/C.06-70 Ferrokesterite Cu2(Fe,Zn)SnS4 I 42m 4 2m
	II/C.06-80 Kesterite Cu2(Zn,Fe)SnS4 I 4 4
	II/C.06-90 Cernyite Cu2CdSnS4 I 42m 4 2m
	II/C.06-100 Velikite Cu2HgSnS4 I 42m 4 2m
	II/C.06-110 Hocartite Ag2FeSnS4 I 42m 4 2m
	II/C.06-120 Pirquitasite Ag2ZnSnS4 I 42m 4 2m
	II/C.06-130 Sakuraiite (Cu,Zn,Fe,In,Sn)4S4 P 432, P 43m, or P m3m Cubic
	II/C.06-140 Petrukite (Cu,Fe,Zn)2(Sn,In)S4 P mn21 mm2
	II/C.06-150 Rhodostannite Cu2FeSn3S8 I 41/a 4/m
	II/C.06-160 Toyohaite Ag2FeSn3S8 I 41/a 4/m
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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris Search for Luzonite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Luzonite : AA Mineral Specimens B & L Fine Minerals Crystal Vaults Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Luzonite Mineral Data : Ask about Luzonite here : Ask-A-Mineralogist from the Mineralogical Society of America Mindat.org's Discussion Groups Original Rockhounds Discussion Group Rockhounds Discussion Group on Yahoo Groups Mineral Discussion Forum from Fabre Minerals - also available in Español Print or Cut-and-Paste your Luzonite Specimen Label here : Luzonite Cu3AsS4 Dana No: 3.2.2.1 Strunz No: II/C.06-10 Locality:   Notes: