Daubreelite Mineral Data

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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⁺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.

Name Pronunciation:

Daubreelite + Pronunciation

Synonym:

ICSD 36251

PDF 4-651

Daubreelite Image

Images:

Daubreelite Alabandite

Comments: Daubreelite (D), bright metallic white, with alabandite (A) (dull yellow) as inclusions in a polished section of an achondrite meteorite.
Location: Norton County, Kansas. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Daubreelite Schollhornite 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 - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 1.77(1), 3.02(0.8), 2.51(0.6),

Crystal Structure:

Mouse
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

Riedel E , Karl R , Rackwitz R , Journal of Solid State Chemistry , 40 (1981) p.255-265, Mossbauer studies of thiospinels. V. The systems Cu1-xFexMe2S4 (Me=Cr,Rh) and, Cu1-xFexCr2(S.7Se.3)4, Locality: synthetic

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 Intensity	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
note: Specific Gravity of Daubreelite =3.87 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Daubreelite= 16.45 barns/electron
U=PE_Daubreelite x rElectron Density= 60.97 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Daubreelite is 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 :
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 Daubreelite Specimen Label here :

Daubreelite

Fe++Cr2S4
Dana No: 02.10.01.11 Strunz No: 02.DA.05
Locality:

Notes: