General Daubreelite Information
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Chemical Formula: |
Fe++Cr2S4 |
Composition: |
Molecular Weight = 288.10 gm |
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Chromium 36.10 % Cr |
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Iron 19.38 % Fe |
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Sulfur 44.52 % S |
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______ |
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100.00 % |
Empirical Formula: |
Fe2+Cr2S4 |
Environment: |
In small amounts in many meteorites. |
IMA Status: |
Valid Species (Pre-IMA) 1876 |
Locality: |
In iron meteorites, such as the Cosby's Creek, Toluca, Cranbourne, and Mundrabilla octahedrites, and the Coahuila, North Chile, and Scottsville hexahedrites. Link to MinDat.org Location Data. |
Name Origin: |
For Professor Gabriel Auguste Daubree (1814-1896), of Paris, France. |
Synonym: |
ICSD 36251 |
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PDF 4-651 |
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Daubreelite Image |
Images:
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Daubreelite Crystallography
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Cell Dimensions: |
a = 9.966, Z = 8; V = 989.83 Den(Calc)= 3.87 |
Crystal System: |
Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m |
X Ray Diffraction: |
By Intensity(I/Io): 1.77(1), 3.02(0.8), 2.51(0.6), |
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Physical Properties of Daubreelite
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Color: |
Black. |
Density: |
3.81 |
Diaphaniety: |
Opaque |
Fracture: |
Brittle - Uneven - Very brittle fracture producing uneven fragments. |
Hardness: |
4.5-5 - Near Apatite |
Luster: |
Metallic |
Streak: |
brown black |
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Optical Properties of Daubreelite
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Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Daubreelite in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
33.30 |
 |
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| 420 nm |
33.20 |
 |
| 440 nm |
33.10 |
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| 460 nm |
33.00 |
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| 480 nm |
33.10 |
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| 500 nm |
33.10 |
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| 520 nm |
33.10 |
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| 540 nm |
33.00 |
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| 560 nm |
33.00 |
 |
| 580 nm |
32.90 |
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| 600 nm |
32.80 |
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| 620 nm |
32.70 |
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| 640 nm |
32.40 |
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| 660 nm |
32.30 |
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| 680 nm |
32.10 |
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| 700 nm |
31.90 |
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Calculated Relative Intensity Colors of Daubreelite in Air
Relative Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
240% |
270% |
| R |
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Calculated Properties of Daubreelite
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Electron Density: |
relectron=3.71 gm/cc note: rDaubreelite =3.87 gm/cc. |
Fermion Index |
Fermion Index = 0.04173 Boson Index = 0.95827 |
Photoelectric: |
PEDaubreelite = 16.45 barns/electron U=PEDaubreelite x relectron= 60.97 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Daubreelite is Not Radioactive |
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Daubreelite Classification
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Dana Class: |
2.10.1.11 (2)Sulfides - Including Selenides and Tellurides |
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(2.10)where Am Bn Xp, with (m+n):p=3:4 |
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(2.10.1)Linnaeite Group (Isometric: Fd3m) |
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2.10.1.1 Linnaeite CoCo2S4 F d3m 4/m 3 2/m |
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2.10.1.2 Carrollite Cu(Co,Ni)2S4 F d3m 4/m 3 2/m |
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2.10.1.3 Fletcherite Cu(Ni,Co)2S4 F d3m 4/m 3 2/m |
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2.10.1.4 Tyrrellite (Cu,Co,Ni)3Se4 F d3m 4/m 3 2/m |
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2.10.1.5 Bornhardtite CoCo2Se4 F d3m 4/m 3 2/m |
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2.10.1.6 Siegenite (Ni,Co)3S4 F d3m 4/m 3 2/m |
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2.10.1.7 Polydymite NiNi2S4 F d3m 4/m 3 2/m |
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2.10.1.8 Violarite FeNi2S4 F d3m 4/m 3 2/m |
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2.10.1.9 Trustedtite Ni3Se4 F d3m 4/m 3 2/m |
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2.10.1.10 Greigite FeFe2S4 F d3m 4/m 3 2/m |
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2.10.1.11 Daubreelite FeCr2S4 F d3m 4/m 3 2/m |
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2.10.1.12 Indite FeIn2S4 F d3m 4/m 3 2/m |
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2.10.1.13 Kalininite ZnCr2S4 F d3m 4/m 3 2/m |
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2.10.1.14 Florensovite Cu(Cr1.5Sb0.5)S4 F d3m 4/m 3 2/m |
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2.10.1.15 Cuproiridsite CuIr2S4 F d3m 4/m 3 2/m |
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2.10.1.16 Cuprorhodsite CuRh2S4 F d3m 4/m 3 2/m |
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2.10.1.17 Malanite Cu(Pt,Ir)2S4 F d3m 4/m 3 2/m |
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2.10.1.18 Ferrorhodsite (Fe,Cu)(Rh,Ir,Pt)2S4 F d3m 4/m 3 2/m |
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2.10.1.19 Cadmoindite! CdIn2S4 F d3m 4/m 3 2/m |
Strunz Class: |
II/D.01-100 II - Sulfides and sulphosalts |
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II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold |
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II/D.01 - Linneite group and related compounds |
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II/D.01-10 Greigite FeFe2S4 F d3m 4/m 3 2/m |
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II/D.01-20 Linnaeite CoCo2S4 F d3m 4/m 3 2/m |
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II/D.01-30 Polydymite NiNi2S4 F d3m 4/m 3 2/m |
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II/D.01-40 Carrollite Cu(Co,Ni)2S4 F d3m 4/m 3 2/m |
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II/D.01-50 Fletcherite Cu(Ni,Co)2S4 F d3m 4/m 3 2/m |
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II/D.01-60 Florensovite Cu(Cr1.5Sb0.5)S4 F d3m 4/m 3 2/m |
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II/D.01-70 Violarite FeNi2S4 F d3m 4/m 3 2/m |
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II/D.01-80 Siegenite (Ni,Co)3S4 F d3m 4/m 3 2/m |
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II/D.01-90 Indite FeIn2S4 F d3m 4/m 3 2/m |
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II/D.01-95 Cadmoindite! CdIn2S4 F d3m 4/m 3 2/m |
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II/D.01-100 Daubreelite FeCr2S4 F d3m 4/m 3 2/m |
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II/D.01-110 Kalininite ZnCr2S4 F d3m 4/m 3 2/m |
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II/D.01-120 Bornhardtite CoCo2Se4 F d3m 4/m 3 2/m |
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II/D.01-130 Trustedtite Ni3Se4 F d3m 4/m 3 2/m |
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II/D.01-140 Tyrrellite (Cu,Co,Ni)3Se4 F d3m 4/m 3 2/m |
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Other Daubreelite Information
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References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
See Also: |
Links to other databases for Daubreelite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - Crocoite.com Mineral Locations
4 - EUROmin Project
5 -Google Images
6 -Google Scholar
7 -Handbook of Mineralogy (UofA)
8 -MinDAT
9 -MinMax(Deutsch)
10 -MinMax(English)
11 -Mineralienatlas (Deutsch)
12 -QUT Mineral Atlas
13 - WWW-MINCRYST
14 -École des Mines de Paris
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Print or Cut-and-Paste your Daubreelite Specimen Label here :
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Daubreelite
Fe++Cr2S4
Dana No: 2.10.1.11 Strunz No: II/D.01-100
Locality:
Notes:
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