Haycockite Mineral Data + Say HAYCOCKITE


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General Haycockite Information

Help on Chemical  Formula: Chemical Formula: Cu4Fe5S8
Help on Composition: Composition: Molecular Weight = 789.95 gm
   Iron    35.35 %  Fe
   Copper  32.18 %  Cu
   Sulfur  32.47 %  S
          ______ 
          100.00 % 
Help on Empirical Formula: Empirical Formula: Cu4Fe2+5S8
Help on Environment: Environment: In a hortonolite dunite (replacement) pegmatite in the Bushveld Complex.
Help on IMA Status: IMA Status: Approved IMA 1972
Help on Locality: Locality: Mooihoek Farm, Lydenburg, Transvaal, South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Maurice H. Haycock (1900-), Canadian mineralogist.
Help on Synonym: Synonym: ICSD 1949
  IMA1971-028
  PDF 25-289
 

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Haycockite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1:1:2.9467
Help on Cell Dimensions: Cell Dimensions: a = 10.71, b = 10.71, c = 31.56, Z = 12; V = 3,620.06 Den(Calc)= 4.35
Help on Crystal System: Crystal System: Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 222
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.07(1), 1.88(0.8), 1.89(0.6),
 

Physical Properties of Haycockite

Help on Color: Color: Brass yellow, Metallic.
Help on Density: Density: 4.35
Help on Diaphaniety: Diaphaniety: Opaque
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Haycockite

Help on RL Anisotrophism: RL Anisotrophism: Weak to moderate.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Haycockite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   13.90   13.50 
   
 420 nm   15.50   15.90 
 440 nm   18.30   19.40 
 460 nm   21.70   23.20 
 480 nm   25.10   26.80 
 500 nm   28.20   29.90 
 520 nm   31.00   32.50 
 540 nm   33.30   34.50 
 560 nm   35.10   36.10 
 580 nm   36.60   37.30 
 600 nm   37.80   38.30 
 620 nm   38.60   38.90 
 640 nm   39.20   39.40 
 660 nm   39.60   39.60 
 680 nm   39.80   39.70 
 700 nm   40.00   39.80 
Calculated Relative Intensity Colors of Haycockite in Air
Relative
Intensity
   0%   50% 100% 150% 200% 250% 300% 350% 400% 440%
R1                    
R2                    
 

Calculated Properties of Haycockite

Help on Electron Density: Electron Density:

relectron=4.12 gm/cc
note: rHaycockite =4.35 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00992
Boson Index = 0.99008
Help on Photoelectric: Photoelectric:

PEHaycockite = 26.90 barns/electron
U=PEHaycockite x relectron= 110.79 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Haycockite is Not Radioactive

 

Haycockite Classification

Help on  Dana Class: Dana Class: 2.9.8.2 (2)Sulfides - Including Selenides and Tellurides
  (2.9)where Am Bn Xp, with (m+n):p=1:1
  (2.9.8)Dana Group
 
2.9.8.1 Talnakhite Cu9(Fe,Ni)8S16 I 43m 4 3m
 
2.9.8.2 Haycockite Cu4Fe5S8 P 222 2 2 2
 
2.9.8.3 Mooihoekite Cu9Fe9S16 P 42m- 4 2m
Help on  Strunz Class: Strunz Class: II/C.04-20 II - Sulfides and sulphosalts
  II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1
  II/C.04 - Chalcopyrite group, Mooihoekite - Orickite series
 
II/C.04-10 Mooihoekite Cu9Fe9S16 P 42m- 4 2m
 
II/C.04-20 Haycockite Cu4Fe5S8 P 222 2 2 2
 
II/C.04-30 Putoranite Cu1.1Fe1.2S2 P n3n 4/m 3 2/m
 
II/C.04-35 Isochalcopyrite* Cu8Fe9S16 Unk Cubic
 
II/C.04-40 Talnakhite Cu9(Fe,Ni)8S16 I 43m 4 3m
 
II/C.04-50 Isocubanite CuFe2S3 F m3m 4/m 3 2/m
 
II/C.04-60 Orickite CuFeS2·(H2O) Unk Hex
 

Other Haycockite 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 Haycockite :
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

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Print or Cut-and-Paste your Haycockite Specimen Label here :

Haycockite

Cu4Fe5S8
Dana No: 2.9.8.2 Strunz No: II/C.04-20
Locality:

 

Notes:

 

 
   
 
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