Coulsonite Mineral Data

General Coulsonite Information

Chemical Formula:

Fe++V+++2O4

Composition:

Molecular Weight = 221.73 gm

Vanadium 45.95 % V 67.60 % V₂O₃

Iron 25.19 % Fe 32.40 % FeO

Oxygen 28.86 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺V³⁺₂O₄

Environment:

Veinlets of magnetite, with silicate minerals, cutting metamorphosed andesite.

IMA Status:

Valid Species (Pre-IMA) 1937

Locality:

Buena Vista Hills, 32 km southeast of Lovelock, Mineral Basin district, Pershing Co., Nevada, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Arthur Lennox Coulson (1898-?), geologist of the Indian Geological Survey.

Synonym:

ICSD 28962

PDF 15-122

Coulsonite Image

Images:

Coulsonite

Comments: Evenly disseminated fine-grained coulsonite in subhedral crystals (light gray) scattered through silicate gangue (dark gray), composed of chlorite, muscovite and scapolite. (AmMin, v47:1284).
Location: Metamorphosed igneous rocks of the Buena Vista Hills located some twenty miles southeast of the town of Lovelock, Nevada, USA. Scale: Picture Size 135 x.
© American Mineralogist

Coulsonite Crystallography

Cell Dimensions:

a = 8.297, Z = 8; V = 571.17 Den(Calc)= 5.16

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): 2.5(1), 2.07(0.8), 2.93(0.6),

Crystal Structure:

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Reuter B , Riedel E , Hug P , Arndt D , Geisler U , Behnke J , Zeitschrift fur Anorganische und Allgemeine Chemie , 369 (1969) p.306-312, Zur kristallchemie der vanadin(III)-spinelle

Physical Properties of Coulsonite

Color:

Blue gray.

Density:

5.17 - 5.2, Average = 5.18

Diaphaneity:

Opaque

Hardness:

4.5-5 - Near Apatite

Luster:

Metallic

Streak:

black brown

Optical Properties of Coulsonite

Optical Data:

NCalc= 2.29 - from Gladstone-Dale relationship (KC = 0.2495) where Ncalc=Dcalc*KC+1
NCalc= 2.29 - from Gladstone-Dale relationship (KC = 0.2495) where Ncalc=Dmeas*KC+1

Calculated Properties of Coulsonite

Electron Density:

Bulk Density (Electron Density)=4.84 gm/cc
note: Specific Gravity of Coulsonite =5.16 gm/cc.

Fermion Index:

Fermion Index = 0.0066269727
Boson Index = 0.9933730273

Photoelectric:

PE_Coulsonite= 16.72 barns/electron
U=PE_Coulsonite x rElectron Density= 80.95 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Coulsonite is Not Radioactive

Coulsonite Classification

Dana Class:

07.02.04.02 (07)Multiple Oxides

(07.02)(A+ B++)2 X4 Spinel group

(07.02.04)(Vanadium subgroup)

07.02.04.01 Vuorelainenite (Mn,Fe)(V,Cr)2O4 F d3m 4/m 3 2/m

07.02.04.02 Coulsonite FeV2O4 F d3m 4/m 3 2/m

07.02.04.03 Magnesiocoulsonite MgV2O4 F d3m 4/m 3 2/m

Strunz Class:

04.BB.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.B - Metal:Oxygen = 3:4 and similar

04.BB -With only medium-sized cations

04.BB.05 Cochromite (Co,Ni,Fe)(Cr,Al)2O4 F d3m 4/m 3 2/m

04.BB.05 Filipstadite (Mn,Mg)4SbFeO8 pseudo ISO 2/m 2/m 2/m

04.BB.05 Magnetite FeFe2O4 F d3m 4/m 3 2/m

04.BB.05 Gahnite ZnAl2O4 F d3m 4/m 3 2/m

04.BB.05 Chromite FeCr2O4 F d3m 4/m 3 2/m

04.BB.05 Galaxite (Mn,Mg)(Al,Fe)2O4 F d3m 4/m 3 2/m

04.BB.05 Cuprospinel (Cu,Mg)Fe2O4 F d3m 4/m 3 2/m

04.BB.05 Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m

04.BB.05 Brunogeierite (Ge,Fe)Fe2O4 F d3m 4/m 3 2/m

04.BB.05 Coulsonite FeV2O4 F d3m 4/m 3 2/m

04.BB.05 Hercynite FeAl2O4 F d3m 4/m 3 2/m

04.BB.05 Franklinite (Zn,Mn,Fe)(Fe,Mn)2O4 F d3m 4/m 3 2/m

04.BB.05 Jacobsite (Mn,Fe,Mg)(Fe,Mn)2O4 F d3m 4/m 3 2/m

04.BB.05 Magnesiochromite MgCr2O4 F d3m 4/m 3 2/m

04.BB.05 Magnesioferrite MgFe2O4 F d3m 4/m 3 2/m

04.BB.05 Magnesiocoulsonite MgV2O4 F d3m 4/m 3 2/m

04.BB.05 Manganochromite (Mn,Fe)(Cr,V)2O4 F d3m 4/m 3 2/m

04.BB.05 Qandilite (Mg,Fe)2(Ti,Fe,Al)O4 F d3m 4/m 3 2/m

04.BB.05 Nichromite (Ni,Co,Fe)(Cr,Fe,Al)2O4 F d3m 4/m 3 2/m

04.BB.05 Spinel MgAl2O4 F d3m 4/m 3 2/m

04.BB.05 Ulvospinel TiFe2O4 F d3m 4/m 3 2/m

04.BB.05 Zincochromite ZnCr2O4 F d3m 4/m 3 2/m

04.BB.05 Trevorite NiFe2O4 F d3m 4/m 3 2/m

04.BB.05 Vuorelainenite (Mn,Fe)(V,Cr)2O4 F d3m 4/m 3 2/m

Other Coulsonite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Coulsonite :
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 Coulsonite Specimen Label here :

Coulsonite

Fe++V+++2O4
Dana No: 07.02.04.02 Strunz No: 04.BB.05
Locality:

Notes: