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Chenmingite

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09288130015413448078658.jpg
Chen Ming
Formula:
FeCr2O4
Specific Gravity:
5.27 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in honor of Chen Ming (陈鸣) (b. 1957), researcher and professor at the Guangzhou Institute of Geochemistry, Chinese Academy of Sciences. He is an expert in high-pressure mineralogy.
Polymorph of:
A dimorph of chromite


Hide all sections | Show all sections

Classification of ChenmingiteHide

Approved
Approval Year:
2017
First Published:
2019
4.BB.

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

Physical Properties of ChenmingiteHide

Comment:
Harder than chromite
Density:
5.27(2) g/cm3 (Calculated)

Chemical Properties of ChenmingiteHide

Formula:
FeCr2O4

Crystallography of ChenmingiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnma
Setting:
Pnma
Cell Parameters:
a = 9.715(6) Å, b = 2.87(1) Å, c = 9.49(7) Å
Ratio:
a:b:c = 3.385 : 1 : 3.307
Unit Cell V:
264.6 ų
Z:
4

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.672Å(100)
2.637Å(37)
2.387Å(49)
2.366Å(20)
2.071Å(28)
1.585Å(23)
1.262Å(21)
1.431Å(18)
Comments:
From Type Description.

Geological EnvironmentHide

Paragenetic Mode(s):

Type Occurrence of ChenmingiteHide

General Appearance of Type Material:
Micrometer- to submicrometer-sized lamellae
Place of Conservation of Type Material:
Type material is deposited in the meteorite collections of the Frank H. McClung Museum, University of Tennessee, Knoxville, Tennessee 37996, USA, Tissint section UT2
Geological Setting of Type Material:
Lamellae within precursor chromite grains, next to shock-induced melt pockets, from the Tissint martian meteorite
Reference:
Ma, C., Tschauner, O., Beckett, J.R., Liu, Y., Greenberg, E., Prakapenka, V.B. (2019) Chenmingite, FeCr2O4 in the CaFe2O4-type structure, a shock-induced, high-pressure mineral in the Tissint martian meteorite. American Mineralogist: 104(10): 1521-1529.

Synonyms of ChenmingiteHide

Relationship of Chenmingite to other SpeciesHide

Other Members of this group:
EllinaiteCaCr2O4Orth. mmm (2/m 2/m 2/m) : Pnma
HarmuniteCaFe2O4Orth. mmm (2/m 2/m 2/m) : Pbcm
MarokiteCaMn3+2O4Orth.
Tschaunerite (Fe2+)(Fe2+Ti4+)O4Orth. mmm (2/m 2/m 2/m) : Cmcm
WernerkrauseiteCa(Fe3+,Mn3+)2Mn4+O6Orth. mmm (2/m 2/m 2/m) : Pnma
XieiteFe2+Cr2O4Orth. mmm (2/m 2/m 2/m)

Related Minerals - Nickel-Strunz GroupingHide

4.BB.ThermaerogeniteCuAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05ChromiteFe2+Cr3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05Cochromite(Co,Ni,Fe)(Cr,Al)2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05CoulsoniteFe2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05CuprospinelCu2+Fe3+2O4Iso.
4.BB.05Filipstadite(Fe3+0.5Sb5+0.5)Mn2O4Iso.
4.BB.05FrankliniteZn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05GahniteZnAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05GalaxiteMn2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05HercyniteFe2+Al2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05JacobsiteMn2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05ManganochromiteMn2+Cr2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05MagnesiocoulsoniteMgV2O4Iso.
4.BB.05MagnesiochromiteMgCr2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05MagnesioferriteMgFe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05MagnetiteFe2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05Nichromite(Ni,Co,Fe)(Cr,Fe,Al)2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05Qandilite(Mg,Fe3+)2(Ti,Fe3+,Al)O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05SpinelMgAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05TrevoriteNi2+Fe3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05UlvöspinelTiFe2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05VuorelaineniteMn2+V3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05ZincochromiteZnCr2O4Iso.
4.BB.10HausmanniteMn2+Mn3+2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
4.BB.10HetaeroliteZnMn2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
4.BB.10HydrohetaeroliteZnMn2O4 · H2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd
4.BB.10Jacobsite-QT(Mn2+)M(Fe3+2)O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
4.BB.15Maghemite(Fe3+0.670.33)Fe3+2O4Iso. 4 3 2 : P41 3 2
4.BB.15Titanomaghemite(Ti4+0.50.5)Fe2O4Iso. 4 3 2 : P43 3 2
4.BB.20Tegengrenite(Mn3+0.5Sb5+0.5)Mg2O4Trig.
4.BB.25XieiteFe2+Cr2O4Orth. mmm (2/m 2/m 2/m)

Other InformationHide

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 ChenmingiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Ma, C. and Tschauner, O. (2017) Chenmingite, IMA 2017-036. CNMNC Newsletter No. 38, August 2017, page 1037; Mineralogical Magazine: 81: 1033–1038.
Ma, C., Tschauner, O., Beckett, J.R., Liu, Y., Greenberg, E., Prakapenka, V.B. (2019) Chenmingite, FeCr2O4 in the CaFe2O4-type structure, a shock-induced, high-pressure mineral in the Tissint martian meteorite. American Mineralogist: 104(10): 1521-1529.

Internet Links for ChenmingiteHide

Localities for ChenmingiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Morocco (TL)
 
  • Souss-Massa Region
    • Tata Province
Ma, C. and Tschauner, O. (2017) Chenmingite, IMA 2017-036. CNMNC Newsletter No. 38, August 2017, page 1037; Mineralogical Magazine: 81: 1033–1038.
 
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