Daubreelite Mineral Data
General Daubreelite Information
Chemical Formula: Fe++Cr2S4
Composition: Molecular Weight = 288.10 gm
Chromium 36.10 % Cr
Iron 19.38 % Fe
Sulfur 44.52 % S
______
100.00 %
Empirical Formula: Fe2+ Cr2 S4
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.
Name Pronunciation: Daubreelite + Pronunciation
Synonym: ICSD 36251
PDF 4-651
Daubreelite Image
Images:
Images:
Schollhornite Daubreelite Caswellsilverite
Comments: Polished section (PPL) of schiillhornite (Sh), coexisting with caswellsilverite (Cw), ferromagnesian alabandite (Ab) and daubreelite (Db). (AmMin, v70:638).Location: Norton County (Kansas-Nebraska) enstatite achondrite meteorite.
Scale: Scale bar is 0.08 mm.© American Mineralogist
Daubreelite Crystallography
Cell Dimensions: a = 9.966, Z = 8; V = 989.83 Den(Calc)= 3.87
Crystal System: Isometric - Hexoctahedral 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),
Physical Properties of Daubreelite
Color: Black.
Density: 3.81
Diaphaneity: Opaque
Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Hardness: 4.5-5 - Near Apatite
Luster: Metallic
Streak: brown black
Optical Properties of Daubreelite
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Daubreelite in Air
λ R ∑ R (λ)
400 nm 33.30
420 nm 33.20
440 nm 33.10
460 nm 33.00
480 nm 33.10
500 nm 33.10
520 nm 33.10
540 nm 33.00
560 nm 33.00
580 nm 32.90
600 nm 32.80
620 nm 32.70
640 nm 32.40
660 nm 32.30
680 nm 32.10
700 nm 31.90
Calculated Relative Intensity Colors of Daubreelite in Air
Relative 0% 30% 60% 90% 100% 120% 150% 180% 210% 240% 270%
R
Calculated Properties of Daubreelite
Electron Density: Bulk Density (Electron Density)=3.71 gm/cc
Fermion Index: Fermion Index = 0.04
Photoelectric: PEDaubreelite = 16.45 barns/electronU=PEDaubreelite x r Electron Density= 60.97 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)Not Radioactive
Daubreelite Classification
Dana Class: 02.10.01.11 (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 Daubreelite Information
References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
See Also: Links to other databases for Daubreelite : Am. Min. Crystal Structure Database Athena EUROmin Project Ecole des Mines de Paris GeoScienceWorld Google Images Google Scholar Handbook of Mineralogy (MinSocAm) Handbook of Mineralogy (UofA) MinDAT Mineralienatlas (Deutsch) Online Mineral Museum QUT Mineral Atlas Ruff.Info WWW-MINCRYST Search for Daubreelite using:
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Daubreelite
Fe++Cr2S4 Dana No: 02.10.01.11 Strunz No: 02.DA.05 Locality:
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