Trevorite Mineral Data

General Trevorite Information

Chemical Formula:

NiFe+++2O4

Composition:

Molecular Weight = 231.86 gm

Magnesium 0.42 % Mg 0.70 % MgO

Aluminum 0.12 % Al 0.22 % Al₂O₃

Iron 55.16 % Fe 9.30 % FeO / 68.53 % Fe₂O₃

Nickel 16.71 % Ni 21.26 % NiO

Oxygen 27.60 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ni_0.66Fe²⁺_0.3Mg_0.04Fe³⁺_1.99Al_0.01O₄

Environment:

In a small tabular body of nickeliferous serpentinite, probably a contact deposit, along the junction of quartzite and an ultramafic intrusive.

IMA Status:

Valid Species (Pre-IMA) 1921

Locality:

Found three km west of the Scotia talc mine, Bon Accord area, Barberton, Transvaal, South Africa. Link to MinDat.org Location Data.

Name Origin:

Named for Major Tudor Gruffydd Trevor, mining inspector for the Pretoria District, Transvaal, South Africa.

Name Pronunciation:

Trevorite + Pronunciation

Synonym:

ICSD 67846

PDF 10-325

Trevorite Image

Images:

Trevorite Willemseite

Comments: Small trevorite crystal in massive willemseite.
Location: Bon Accord, Barberton Mountain, Mpumalanga, South Africa. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Willemseite Trevorite

Comments: Waxy translucent green willemseite with black trevorite in schistose rock.
Location: Near Scotia Talc Mine, Barberton Mountain, Transvaal, Mpumalanga, South Africa. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Trevorite Crystallography

Cell Dimensions:

a = 8.41, Z = 8; V = 594.82 Den(Calc)= 5.18

Crystal System:

Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m

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

By Intensity(I/I_o): 2.513(1), 1.476(0.4), 1.605(0.3),

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Physical Properties of Trevorite

Cleavage:

None

Color:

Black.

Density:

5.165

Diaphaneity:

Opaque

Fracture:

Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Hardness:

5 - Apatite

Luster:

Metallic

Streak:

black

Optical Properties of Trevorite

Optical Data:

NCalc= 2.41 - from Gladstone-Dale relationship (KC = 0.2726) where Ncalc=Dcalc*KC+1
NCalc= 2.41 - from Gladstone-Dale relationship (KC = 0.2726) where Ncalc=Dmeas*KC+1

Calculated Properties of Trevorite

Electron Density:

Bulk Density (Electron Density)=4.94 gm/cc
note: Specific Gravity of Trevorite =5.18 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Trevorite= 23.61 barns/electron
U=PE_Trevorite x rElectron Density= 116.72 barns/cc.

Radioactivity:

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

Trevorite Classification

Dana Class:

07.02.02.05 (07)Multiple Oxides

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

(07.02.02)(Iron subgroup)

07.02.02.01 Magnesioferrite MgFe2O4 F d3m 4/m 3 2/m

07.02.02.02 Jacobsite (Mn,Fe,Mg)(Fe,Mn)2O4 F d3m 4/m 3 2/m

07.02.02.03 Magnetite FeFe2O4 F d3m 4/m 3 2/m

07.02.02.04 Franklinite (Zn,Mn,Fe)(Fe,Mn)2O4 F d3m 4/m 3 2/m

07.02.02.05 Trevorite NiFe2O4 F d3m 4/m 3 2/m

07.02.02.06 Cuprospinel (Cu,Mg)Fe2O4 F d3m 4/m 3 2/m

07.02.02.07 Brunogeierite (Ge,Fe)Fe2O4 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 Trevorite Information

References:

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

See Also:

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

Trevorite

NiFe+++2O4
Dana No: 07.02.02.05 Strunz No: 04.BB.05
Locality:

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