Haycockite Mineral Data

Haycockite Mineral Data
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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 Name Pronunciation: Name Pronunciation: Haycockite + Pronunciation Say HAYCOCKITE
Help on Synonym: Synonym: ICSD 1949
  IMA1971-028
  PDF 25-289
 

Haycockite Image

Click Here for Larger Haycockite Image in a New Browser Window Images:
Click Here for Larger Haycockite Image

Haycockite   Mooihoekite

Comments: B&W polished section image of mooihoekite-haycockite intergrowth showing tarnished mooihoekite (mh) and haycockite (hc). The small whitest lamellar grains are mackinawite.
Location: Hortonolite dunite (replacement,) pegmatite, Mooihoek Farm, Lydenburg District, Transvaal, South Africa. (AmMin, v57:689). Scale: See Image.
© American Mineralogist

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),
Click Here for Large Haycockite Structure Window Crystal Structure:

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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


Rowland J F , Hall S R , Acta Crystallographica, Section B , 31 (1975) p.2105-2112, Haycockite, Cu4Fe5S8: a superstructure in the chalcopyrite series, Locality: Lydenburg District, Transvaal, South Africa

 

Physical Properties of Haycockite

Help on Color: Color: Brass yellow, Metallic.
Help on Density: Density: 4.35
Help on Diaphaneity: Diaphaneity: 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: Bulk Density (Electron Density)=4.12 gm/cc
note: Specific Gravity of Haycockite =4.35 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0099294535
Boson Index = 0.9900705465
Help on Photoelectric: Photoelectric: PEHaycockite = 26.90 barns/electron
U=PEHaycockite x rElectron Density= 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: 02.09.08.02 (02)Sulfides - Including Selenides and Tellurides
  (02.09)where Am Bn Xp, with (m+n):p=1:1
  (02.09.08)Talnakhite Group
 
02.09.08.01 Talnakhite Cu9(Fe,Ni)8S16 I 43m 4 3m
 
02.09.08.02 Haycockite Cu4Fe5S8 P 222 2 2 2
 
02.09.08.03 Mooihoekite Cu9Fe9S16 P 42m- 4 2m
Help on Strunz Class: Strunz Class: 02.CB.10b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.C - Metal Sulfides, M:S = 1:1 (and similar)
  02.CB -With Zn, Fe, Cu, Ag, Au, etc
 
02.CB.10b Haycockite Cu4Fe5S8 P 222 2 2 2
 
02.CB.10b Mooihoekite Cu9Fe9S16 P 42m- 4 2m
 
02.CB.10b Putoranite Cu1.1Fe1.2S2 P n3n 4/m 3 2/m
 
02.CB.10b Talnakhite Cu9(Fe,Ni)8S16 I 43m 4 3m
 

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

Haycockite

Cu4Fe5S8
Dana No: 02.09.08.02 Strunz No: 02.CB.10b
Locality:

 

Notes: