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Coulsonite Mineral Data
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General Coulsonite Information
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 Chemical Formula: |
Fe++V+++2O4 |
| Composition: |
Molecular Weight = 221.73 gm |
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Vanadium 45.95 % V 67.60 % V2O3 |
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Iron 25.19 % Fe 32.40 % FeO |
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Oxygen 28.86 % O |
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______ ______ |
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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 |
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PDF 15-122 |
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Coulsonite Image |
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Images:
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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 |
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Coulsonite Crystallography
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| Cell Dimensions: |
a = 8.297, Z = 8; V = 571.17 Den(Calc)= 5.16 |
| Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m |
| X Ray Diffraction: |
By Intensity(I/Io): 2.5(1), 2.07(0.8), 2.93(0.6), |
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Physical Properties of Coulsonite
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| Color: |
Blue gray. |
| Density: |
5.17 - 5.2, Average = 5.18 |
| Diaphaneity: |
Opaque |
| Hardness: |
4.5-5 - Near Apatite |
| Luster: |
Metallic |
| Streak: |
black brown |
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Optical Properties of Coulsonite
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| 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
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Calculated Properties of Coulsonite
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| Electron Density: |
Bulk Density (Electron Density)=4.84 gm/cc
note: Specific Gravity of Coulsonite =5.16 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0066269727
Boson Index = 0.9933730273 |
| Photoelectric: |
PECoulsonite = 16.72 barns/electron
U=PECoulsonite x rElectron Density= 80.95 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Coulsonite is Not Radioactive |
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Coulsonite Classification
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| Dana Class: |
07.02.04.02 (07)Multiple Oxides |
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(07.02)(A+ B++)2 X4 Spinel group |
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(07.02.04)(Vanadium subgroup) |
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07.02.04.01 Vuorelainenite (Mn,Fe)(V,Cr)2O4 F d3m 4/m 3 2/m |
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07.02.04.02 Coulsonite FeV2O4 F d3m 4/m 3 2/m |
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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 |
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04.B - Metal:Oxygen = 3:4 and similar |
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04.BB -With only medium-sized cations |
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04.BB.05 Cochromite (Co,Ni,Fe)(Cr,Al)2O4 F d3m 4/m 3 2/m |
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04.BB.05 Filipstadite (Mn,Mg)4SbFeO8 pseudo ISO 2/m 2/m 2/m |
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04.BB.05 Magnetite FeFe2O4 F d3m 4/m 3 2/m |
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04.BB.05 Gahnite ZnAl2O4 F d3m 4/m 3 2/m |
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04.BB.05 Chromite FeCr2O4 F d3m 4/m 3 2/m |
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04.BB.05 Galaxite (Mn,Mg)(Al,Fe)2O4 F d3m 4/m 3 2/m |
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04.BB.05 Cuprospinel (Cu,Mg)Fe2O4 F d3m 4/m 3 2/m |
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04.BB.05 Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m |
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04.BB.05 Brunogeierite (Ge,Fe)Fe2O4 F d3m 4/m 3 2/m |
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04.BB.05 Coulsonite FeV2O4 F d3m 4/m 3 2/m |
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04.BB.05 Hercynite FeAl2O4 F d3m 4/m 3 2/m |
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04.BB.05 Franklinite (Zn,Mn,Fe)(Fe,Mn)2O4 F d3m 4/m 3 2/m |
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04.BB.05 Jacobsite (Mn,Fe,Mg)(Fe,Mn)2O4 F d3m 4/m 3 2/m |
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04.BB.05 Magnesiochromite MgCr2O4 F d3m 4/m 3 2/m |
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04.BB.05 Magnesioferrite MgFe2O4 F d3m 4/m 3 2/m |
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04.BB.05 Magnesiocoulsonite MgV2O4 F d3m 4/m 3 2/m |
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04.BB.05 Manganochromite (Mn,Fe)(Cr,V)2O4 F d3m 4/m 3 2/m |
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04.BB.05 Qandilite (Mg,Fe)2(Ti,Fe,Al)O4 F d3m 4/m 3 2/m |
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04.BB.05 Nichromite (Ni,Co,Fe)(Cr,Fe,Al)2O4 F d3m 4/m 3 2/m |
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04.BB.05 Spinel MgAl2O4 F d3m 4/m 3 2/m |
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04.BB.05 Ulvospinel TiFe2O4 F d3m 4/m 3 2/m |
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04.BB.05 Zincochromite ZnCr2O4 F d3m 4/m 3 2/m |
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04.BB.05 Trevorite NiFe2O4 F d3m 4/m 3 2/m |
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04.BB.05 Vuorelainenite (Mn,Fe)(V,Cr)2O4 F d3m 4/m 3 2/m |
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Other Coulsonite Information
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| 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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Coulsonite
Fe++V+++2O4
Dana No: 07.02.04.02 Strunz No: 04.BB.05
Locality:
Notes:
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