Mineralogy Database

Algodonite Mineral Data

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General Algodonite Information

Help on Chemical  Formula: Chemical Formula: Cu6As
Help on Composition: Composition: Molecular Weight = 456.20 gm
   Copper   83.58 %  Cu
   Arsenic  16.42 %  As
           100.00 % 
Help on Empirical Formula: Empirical Formula: Cu6As
Help on Environment: Environment: Hydrothermal deposits associated with other copper arsenides.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1857
Help on Locality: Locality: Chile, Algodones silver mn, Coquimbo Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Algodonite + Pronunciation Say ALGODONITE
Help on Synonym: Synonym: Whitneyite

Algodonite Image

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Comments: Massive specimen of dark algodonite with vuggy areas filled with minute crystals.
Location: Algodones Mines, Coquímbo Province, Chile. Scale: 4x3x3 cm.
© John Betts - Fine Minerals

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  Koutekite   Algodonite

Comments: Silvery metallic koutekite with darker gray algodonite.
Location: Mohawk Mine, Keweenaw County, Michigan, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Algodonite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.62615
Help on Cell Dimensions: Cell Dimensions: a = 2.6, c = 4.228, Z = 0.3; V = 24.75 Den(Calc)= 9.18
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.989(1), 2.11(0.4), 2.25(0.2),

Physical Properties of Algodonite

Help on Cleavage: Cleavage: None
Help on Color: Color: Gray, Silver white, Steel gray, Tarnishes dull bronze.
Help on Density: Density: 8.38 - 8.72, Average = 8.55
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Tarnishes - Freshly fractured surfaces form a surface oxidation film
Help on Hardness: Hardness: 4 - Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic

Optical Properties of Algodonite

Help on Optical Data: Optical Data: NCalc= 3.02 - from Gladstone-Dale relationship (KC = 0.2202) where Ncalc=Dcalc*KC+1
NCalc= 2.88 - from Gladstone-Dale relationship (KC = 0.2202) where Ncalc=Dmeas*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Weak.
Help on RL Color: RL Color: Bright cream white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Algodonite in Air
λ R  ∑ R(λ) 
 400 nm   54.20   
 420 nm   55.50 
 440 nm   56.80 
 460 nm   58.20 
 480 nm   59.40 
 500 nm   60.60 
 520 nm   61.80 
 540 nm   62.80 
 560 nm   63.80 
 580 nm   64.70 
 600 nm   65.50 
 620 nm   66.20 
 640 nm   66.80 
 660 nm   67.30 
 680 nm   67.70 
 700 nm   68.00 
Calculated Relative Intensity Colors of Algodonite in Air
   0%   20%   40%   60%   80% 100% 120% 140% 160%

Calculated Properties of Algodonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=8.33 gm/cc
note: Specific Gravity of Algodonite =9.18 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0
Boson Index = 1
Help on Photoelectric: Photoelectric: PEAlgodonite = 50.32 barns/electron
U=PEAlgodonite x rElectron Density= 419.22 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Algodonite is Not Radioactive

Algodonite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.01)where Am Xp, with m:p>3:1
  (02.01.01)Dana Group Algodonite Cu6As P 63/mmc 6/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.AA.10a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.A - Simple Sulfides, Selenides, etc
  02.AA -Alloys of metalloids with Cu, Ag, Sn, Au
02.AA.10a Algodonite Cu6As P 63/mmc 6/m 2/m 2/m

Other Algodonite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Algodonite :
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 - Scandinavian mineral gallery

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Dana No: Strunz No: 02.AA.10a





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