Mineralogy Database

Greigite Mineral Data

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General Greigite Information

Help on Chemical  Formula: Chemical Formula: Fe++Fe+++2S4
Help on Composition: Composition: Molecular Weight = 295.81 gm
   Iron    56.64 %  Fe
   Sulfur  43.36 %  S
          ______ 
          100.00 % 
Help on Empirical Formula: Empirical Formula: Fe2+Fe3+2S4
Help on Environment: Environment: In part, a biomineral
Help on IMA Status: IMA Status: Approved IMA 1964
Help on Locality: Locality: Kramer - Four Corners area (Drill cores), San Bernardino Co. California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Dr. Joseph Wilson Grieg (1895-1977).
Help on Name Pronunciation: Name Pronunciation: Greigite Say GREIGITE
Help on Synonym: Synonym: ICSD 42535
  Melnikovite
  PDF 16-713
 

Greigite Image

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  Greigite

Comments: Radiating needles are colloidal greigite with plates of sulfur.
Location: Synthetic material. Scale: See Image.
© Electron Optics Image Gallery / University of Leeds

Greigite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 9.868, Z = 8; V = 960.92 Den(Calc)= 4.09
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.98(1), 1.746(0.77), 2.469(0.55),
 

Physical Properties of Greigite

Help on Cleavage: Cleavage: None
Help on Color: Color: Blue, Blue black, Bronze, Pink.
Help on Density: Density: 4.049
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 4-4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Greigite

Help on RL Color: RL Color: Pale creamy white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Greigite in Air
λ R  ∑ R(λ) 
 400 nm   28.80   
 420 nm   28.90 
 440 nm   29.00 
 460 nm   29.20 
 480 nm   29.40 
 500 nm   29.80 
 520 nm   30.30 
 540 nm   30.70 
 560 nm   31.30 
 580 nm   31.90 
 600 nm   32.40 
 620 nm   33.20 
 640 nm   33.90 
 660 nm   34.70 
 680 nm   35.50 
 700 nm   36.30 
Calculated Relative Intensity Colors of Greigite in Air
Relative
Intensity
   0%   40%   80% 100% 120% 160% 200% 240% 280% 310%
R                    
 

Calculated Properties of Greigite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.93 gm/cc
note: Specific Gravity of Greigite =4.09 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGreigite = 19.48 barns/electron
U=PEGreigite x rElectron Density= 76.51 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Greigite is Not Radioactive
 

Greigite Classification

Help on  Dana Class: Dana Class: 02.10.01.10 (02)Sulfides - Including Selenides and Tellurides
  (02.10)where Am Bn Xp, with (m+n):p=3:4
  (02.10.01)Linnaeite Group (Isometric: Fd3m)
 
02.10.01.01 Linnaeite CoCo2S4 F d3m 4/m 3 2/m
 
02.10.01.02 Carrollite Cu(Co,Ni)2S4 F d3m 4/m 3 2/m
 
02.10.01.03 Fletcherite Cu(Ni,Co)2S4 F d3m 4/m 3 2/m
 
02.10.01.04 Tyrrellite (Cu,Co,Ni)3Se4 F d3m 4/m 3 2/m
 
02.10.01.05 Bornhardtite CoCo2Se4 F d3m 4/m 3 2/m
 
02.10.01.06 Siegenite (Ni,Co)3S4 F d3m 4/m 3 2/m
 
02.10.01.07 Polydymite NiNi2S4 F d3m 4/m 3 2/m
 
02.10.01.08 Violarite FeNi2S4 F d3m 4/m 3 2/m
 
02.10.01.09 Trustedtite Ni3Se4 F d3m 4/m 3 2/m
 
02.10.01.10 Greigite FeFe2S4 F d3m 4/m 3 2/m
 
02.10.01.11 Daubreelite FeCr2S4 F d3m 4/m 3 2/m
 
02.10.01.12 Indite FeIn2S4 F d3m 4/m 3 2/m
 
02.10.01.13 Kalininite ZnCr2S4 F d3m 4/m 3 2/m
 
02.10.01.14 Florensovite Cu(Cr1.5Sb0.5)S4 F d3m 4/m 3 2/m
 
02.10.01.15 Cuproiridsite CuIr2S4 F d3m 4/m 3 2/m
 
02.10.01.16 Cuprorhodsite CuRh2S4 F d3m 4/m 3 2/m
 
02.10.01.17 Malanite Cu(Pt,Ir)2S4 F d3m 4/m 3 2/m
 
02.10.01.18 Ferrorhodsite (Fe,Cu)(Rh,Ir,Pt)2S4 F d3m 4/m 3 2/m
 
02.10.01.19 Cadmoindite! CdIn2S4 F d3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 02.DA.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.D - Metal Sulfides, M:S = 3:4 and 2:3
  02.DA -M:S = 3:4
 
02.DA.05 Bornhardtite CoCo2Se4 F d3m 4/m 3 2/m
 
02.DA.05 Florensovite Cu(Cr1.5Sb0.5)S4 F d3m 4/m 3 2/m
 
02.DA.05 Carrollite Cu(Co,Ni)2S4 F d3m 4/m 3 2/m
 
02.DA.05 Fletcherite Cu(Ni,Co)2S4 F d3m 4/m 3 2/m
 
02.DA.05 Cuproiridsite CuIr2S4 F d3m 4/m 3 2/m
 
02.DA.05 Cuprorhodsite CuRh2S4 F d3m 4/m 3 2/m
 
02.DA.05 Dayingite* CuCoPtS4 F m3m 4/m 3 2/m
 
02.DA.05 Daubreelite FeCr2S4 F d3m 4/m 3 2/m
 
02.DA.05 Ferrorhodsite (Fe,Cu)(Rh,Ir,Pt)2S4 F d3m 4/m 3 2/m
 
02.DA.05 Greigite FeFe2S4 F d3m 4/m 3 2/m
 
02.DA.05 Indite FeIn2S4 F d3m 4/m 3 2/m
 
02.DA.05 Linnaeite CoCo2S4 F d3m 4/m 3 2/m
 
02.DA.05 Kalininite ZnCr2S4 F d3m 4/m 3 2/m
 
02.DA.05 Malanite Cu(Pt,Ir)2S4 F d3m 4/m 3 2/m
 
02.DA.05 Polydymite NiNi2S4 F d3m 4/m 3 2/m
 
02.DA.05 Violarite FeNi2S4 F d3m 4/m 3 2/m
 
02.DA.05 Tyrrellite (Cu,Co,Ni)3Se4 F d3m 4/m 3 2/m
 
02.DA.05 Siegenite (Ni,Co)3S4 F d3m 4/m 3 2/m
 
02.DA.05 Xingzhongite (Pb,Cu,Fe)(Ir,Pt,Rh)2S4 F d3m 4/m 3 2/m
 
02.DA.05 Trustedtite Ni3Se4 F d3m 4/m 3 2/m
 
02.DA.05 Cadmoindite! CdIn2S4 F d3m 4/m 3 2/m
 

Other Greigite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Greigite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST

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

Greigite

Fe++Fe+++2S4
Dana No: 02.10.01.10 Strunz No: 02.DA.05
Locality:

 

Notes:

 

 
   
 


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