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Trevorite

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Formula:
Ni2+Fe23+O4
System:
Isometric
Colour:
Black with green or ...
Hardness:
5
Member of:
Name:
Named after Major Tudor Gruffydd Trevor, mining inspector for the Pretoria District, Transvaal, South Africa, where the species was first found.
Spinel Group, Fe series.

Classification of Trevorite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
4.BB.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only medium-sized cations
7.2.2.5

7 : MULTIPLE OXIDES
2 : AB2X4
7.22.6

7 : Oxides and Hydroxides
22 : Oxides of Ni
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Type Occurrence of Trevorite

Year of Discovery:
1921

Physical Properties of Trevorite

Sub-Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Black with green or brown tint
Streak:
Light brown
Hardness (Mohs):
5
Tenacity:
Brittle
Density:
5.164 g/cm3 (Measured)    5.2 g/cm3 (Calculated)

Crystallography of Trevorite

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
Cell Parameters:
a = 8.41Å
Unit Cell Volume:
V 594.82 ų (Calculated from Unit Cell)
Morphology:
Massive. Rarely found as crystals.
Twinning:
On {111}.

Chemical Properties of Trevorite

Formula:
Ni2+Fe23+O4
Essential elements:
All elements listed in formula:

Relationship of Trevorite to other Species

Member of:
Other Members of Group:
Ceylonite
ChromiteFe2+Cr23+O4
Cochromite(Co,Ni,Fe)(Cr,Al)2O4
CoulsoniteFe2+V23+O4
CuprospinelCu2+Fe23+O4
Filipstadite(Sb0.5Fe0.5)Mn2O4
FrankliniteZn2+Fe23+O4
GahniteZnAl2O4
Galaxite(Mn,Fe,Mg)(Al,Fe)2O4
HercyniteFe2+Al2O4
JacobsiteMn2+Fe23+O4
MagnesiochromiteMg(Cr,Al,Fe)2O4
MagnesiocoulsoniteMgV2O4
MagnesioferriteMgFe23+O4
MagnetiteFe2+Fe23+O4
Manganochromite(Mn,Fe)(Cr,V)2O4
Nichromite(Ni,Co,Fe)(Cr,Fe,Al)2O4
Qandilite(Mg,Fe)2(Ti,Fe,Al)O4
SpinelMgAl2O4
UlvöspinelFe2TiO4
Vuorelainenite(Mn,Fe)(V,Cr)2O4
ZincochromiteZnCr2O4
4.BB.05ChromiteFe2+Cr23+O4
4.BB.05Cochromite(Co,Ni,Fe)(Cr,Al)2O4
4.BB.05CoulsoniteFe2+V23+O4
4.BB.05CuprospinelCu2+Fe23+O4
4.BB.05Filipstadite(Sb0.5Fe0.5)Mn2O4
4.BB.05FrankliniteZn2+Fe23+O4
4.BB.05GahniteZnAl2O4
4.BB.05Galaxite(Mn,Fe,Mg)(Al,Fe)2O4
4.BB.05HercyniteFe2+Al2O4
4.BB.05JacobsiteMn2+Fe23+O4
4.BB.05Manganochromite(Mn,Fe)(Cr,V)2O4
4.BB.05MagnesiocoulsoniteMgV2O4
4.BB.05MagnesiochromiteMg(Cr,Al,Fe)2O4
4.BB.05MagnesioferriteMgFe23+O4
4.BB.05MagnetiteFe2+Fe23+O4
4.BB.05Nichromite(Ni,Co,Fe)(Cr,Fe,Al)2O4
4.BB.05Qandilite(Mg,Fe)2(Ti,Fe,Al)O4
4.BB.05SpinelMgAl2O4
4.BB.05UlvöspinelFe2TiO4
4.BB.05Vuorelainenite(Mn,Fe)(V,Cr)2O4
4.BB.05ZincochromiteZnCr2O4
4.BB.10HausmanniteMn2+Mn23+O4
4.BB.10HetaeroliteZnMn2O4
4.BB.10HydrohetaeroliteZnMn2O4 · H2O
4.BB.10IwakiiteMn2+Fe23+O4
4.BB.15MaghemiteFe23+O3
4.BB.15TitanomaghemiteFe3+(Fe3+,Ti4+,Fe2+,◻)2O4
4.BB.20Tegengrenite(Mg,Mn2+)2Sb5+0.5(Mn3+,Si,Ti)0.5O4
4.BB.25XieiteFe2+Cr2O4
7.22.1BunseniteNiO
7.22.3TheophrastiteNi(OH)2
7.22.4Jamborite(Ni2+1-x,Cox3+(OH)2-x(SO4)x·nH2O [x ≤ ⅓; n ≤ (1 - x)]
7.22.5TakoviteNi6Al2(OH)16[CO3] · 4H2O
7.22.7Nichromite(Ni,Co,Fe)(Cr,Fe,Al)2O4

Other Names for Trevorite

Name in Other Languages:
German:Trevorit
Simplified Chinese:镍磁铁矿
Spanish:Trevorita

Other Information

Magnetism:
Diamagnetic
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Trevorite

Reference List:
Crosse (1921), Journal of the Chemical, Metallurgical and Mineralogical Society of South Africa: 21: 126.

Crosse (1923), American Mineralogist: 8: 37.

Walker (1923), University of Toronto Studies, Geology series: 16: 53.

Doelter (1926): 3(2): 666 (as nickelmagnetite).

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume I: 698-707.

American Mineralogist (1969): 54: `1204-1208.

American Mineralogist (1972): 57: 1524-1527.

Internet Links for Trevorite

Localities for Trevorite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Atlantic Ocean
 
  • Mid-Atlantic Ridge complex
Gablina, I.F., Semkova, T.A., Stepanova, T.V., and Gor'kova, N.V. (2006): Lithology and Mineral Resources 41(1), 27-44.
Australia
 
  • Western Australia
    • Leonora Shire
      • Ten Mile Outcamp
Economic Geology; October 1981; v. 76; no. 6; p. 1686-1697
Burundi
 
  • Rutana Province
Frank K. Mazdab collection (will verify with EPMA); The Royal Museum for Central Africa (RMCA), sample # 13203; http://metafro.be/mineralogy/browse_hierarchical_geo?country=Burundi
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District slag localities
        • Agios Konstantinos [St Constantine] (Kamariza)
Kolitsch, U., Rieck, B., Brandstätter, F., Schreiber, F., Fabritz, K. H., Blaß, G. & Gröbner, J. (2014): Neufunde aus dem altem Bergbau und den Schlacken von Lavrion (II). Mineralien-Welt 25 (2), 82-95 (in German).
Israel
 
  • Negev
Vapnik, Y., Sokol, E., Murashko M., Sharygin V. (2006): The enigma of Hatrurim. Mineralogical Almanac, 10, 69-77.
Italy
 
  • Sardinia
    • Nuoro Province
      • Gadoni
Stara, P., Rizzo, R., Sabelli, C., Ibba, A. (1999): I minerali di Funtana Raminosa. Rivista Mineralogica Italiana, 1/1999, 10-27.
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Ząbkowice District
      • Ząbkowice (Frankenstein)
Sachanbiński et al. 2000: Heavy minerals in the serpentinite weathering cover of the Szklary massif. Geologia Sudetica, vol. 33, pp. 131-141.
Russia
 
  • Far-Eastern Region
    • Koriak Autonomous Okrug
      • Koryak Upland (Koriak; Koriakskhiye)
        • Iomrautvaam Massif
          • Chetkinvaiam tectonic melange
            • Khatyrka river
              • Listvenitovyi Stream
Scientific Report 5:9111
South Africa (TL)
 
  • Mpumalanga Province
    • Ehlanzeni District
      • Barberton
        • Bon Accord
Am Min 57 (1972), 1524
Cairncross, B. and Dixon, R., (1995) Minerals of South Africa. The Geological Society of South Africa: 20; Am. Min. 61, 502 (1976); Am Min 54 (1969), 1204-1208
  • North West Province
    • Dr Ruth Segomotsi Mompati District
      • Vryburg
www.lpi.usra.edu/meetings/impacts97/pdf/6055.pdf.
USA
 
  • Nevada
    • Nye Co.
      • Gabbs District
        • Gabbs
NBMG Spec Pub 31 Minerals of Nevada
  • Oregon
    • Josephine Co.
      • Josephine Creek District
www.geo.cornell.edu/geology/faculty/Bird.html.
Mineral and/or Locality  
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