|
![Mineralogy Database Mineralogy Database](/images/Hedyphane_Crystal.gif) |
Greigite Mineral Data
|
|
|
General Greigite Information
|
Chemical Formula: |
Fe++Fe+++2S4 |
Composition: |
Molecular Weight = 295.81 gm |
|
Iron 56.64 % Fe |
|
Sulfur 43.36 % S |
|
______ |
|
100.00 % |
Empirical Formula: |
Fe2+Fe3+2S4 |
Environment: |
In part, a biomineral |
IMA Status: |
Approved IMA 1964 |
Locality: |
Kramer - Four Corners area (Drill cores), San Bernardino Co. California. Link to MinDat.org Location Data. |
Name Origin: |
For Dr. Joseph Wilson Grieg (1895-1977). |
Name Pronunciation: |
Greigite |
Synonym: |
ICSD 42535 |
|
Melnikovite |
|
PDF 16-713 |
|
Greigite Image |
Images:
|
|
Greigite Crystallography
|
Cell Dimensions: |
a = 9.868, Z = 8; V = 960.92 Den(Calc)= 4.09 |
Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m |
X Ray Diffraction: |
By Intensity(I/Io): 2.98(1), 1.746(0.77), 2.469(0.55), |
|
Physical Properties of Greigite
|
Cleavage: |
None |
Color: |
Blue, Blue black, Bronze, Pink. |
Density: |
4.049 |
Diaphaneity: |
Opaque |
Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
Hardness: |
4-4.5 - Between Fluorite and Apatite |
Luster: |
Metallic |
Streak: |
black |
|
Optical Properties of Greigite
|
RL Color: |
Pale creamy white. |
Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Greigite in Air
λ |
R |
![](../images/Reflect_scale_v.gif) |
∑ R(λ) |
400 nm |
28.80 |
![](../images/400nm.BMP) |
|
420 nm |
28.90 |
![](../images/420nm.BMP) |
440 nm |
29.00 |
![](../images/440nm.BMP) |
460 nm |
29.20 |
![](../images/460nm.BMP) |
480 nm |
29.40 |
![](../images/480nm.BMP) |
500 nm |
29.80 |
![](../images/500nm.BMP) |
520 nm |
30.30 |
![](../images/520nm.BMP) |
540 nm |
30.70 |
![](../images/540nm.BMP) |
560 nm |
31.30 |
![](../images/560nm.BMP) |
580 nm |
31.90 |
![](../images/580nm.BMP) |
600 nm |
32.40 |
![](../images/600nm.BMP) |
620 nm |
33.20 |
![](../images/620nm.BMP) |
640 nm |
33.90 |
![](../images/640nm.BMP) |
660 nm |
34.70 |
![](../images/660nm.BMP) |
680 nm |
35.50 |
![](../images/680nm.BMP) |
700 nm |
36.30 |
![](../images/700nm.BMP) |
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
|
Electron Density: |
Bulk Density (Electron Density)=3.93 gm/cc note: Specific Gravity of Greigite =4.09 gm/cc. |
Fermion Index: |
Fermion Index = 0.01 Boson Index = 0.99 |
Photoelectric: |
PEGreigite = 19.48 barns/electron U=PEGreigite x rElectron Density= 76.51 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Greigite is Not Radioactive |
|
Greigite Classification
|
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 |
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
|
References: |
NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
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
Search for Greigite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Greigite :
Ask about Greigite 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
Espaņol
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:
|
|
|
|
|
|
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.