Xieite
A valid IMA mineral species
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About Xieite
Xiande Xie
Formula:
Fe2+Cr2O4
Specific Gravity:
5.63
Crystal System:
Orthorhombic
Member of:
Name:
Named by M. Chen, J. Shu, and H. Mao in 2008 in honor of Xiande Xie (谢先德) (October 1934, Zhenjiang, Jiangsu Province, China - ), the former president of the International Mineralogical Association from 1990 to 1994 and professor at the Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, for his contribution to mineralogy and shock effects of minerals.
Type Locality:
Polymorph of:
Spinel group. High-pressure polymorph of chromite.
The first natural occurrence of a high-pressure polymorph of chromite has been discovered in the shock-metamorphosed Suizhou meteorite. The composition of this high-pressure polymorph is identical to that of the precursor chromite. The Raman spectrum of this polymorph is distinct from that of chromite. The P-T conditions for the phase transformation from chromite to the CaTi2O4-structured polymorph are estimated at 20–23 GPa and 1800 to 2000 °C, respectively. This dense CaTi2O4-structured FeCr2O4 phase could be a host phase for Cr, Al, Fe, Mg and Mn and other metallic elements in the deep Earth.
The first natural occurrence of a high-pressure polymorph of chromite has been discovered in the shock-metamorphosed Suizhou meteorite. The composition of this high-pressure polymorph is identical to that of the precursor chromite. The Raman spectrum of this polymorph is distinct from that of chromite. The P-T conditions for the phase transformation from chromite to the CaTi2O4-structured polymorph are estimated at 20–23 GPa and 1800 to 2000 °C, respectively. This dense CaTi2O4-structured FeCr2O4 phase could be a host phase for Cr, Al, Fe, Mg and Mn and other metallic elements in the deep Earth.
Unique Identifiers
Mindat ID:
35792
Long-form identifier:
mindat:1:1:35792:2
GUID
(UUID V4):
(UUID V4):
a7668053-c5ef-4202-98e2-e5bc030daf53
IMA Classification of Xieite
Approved
IMA Formula:
FeCr2O4
Approval year:
2007
First published:
2008
Approval history:
IMA 2007-056
Classification of Xieite
4.BB.25
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
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
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Xi | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Xieite
Hardness Data:
Could not be measured
Comment:
Harder than chromite.
Density:
5.63 g/cm3 (Measured) 5.342 g/cm3 (Calculated)
Chemistry of Xieite
Mindat Formula:
Fe2+Cr2O4
Elements listed:
Crystallography of Xieite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 9.462(6) Å, b = 9.562(9) Å, c = 2.916(1) Å
Ratio:
a:b:c = 0.99 : 1 : 0.305
Unit Cell V:
263.8 ų
Z:
4
Comment:
space group Bbmm
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.675 Å | (100) |
| 2.389 Å | (20) |
| 2.089 Å | (10) |
| 1.953 Å | (90) |
| 1.566 Å | (60) |
| 1.439 Å | (15) |
| 1.425 Å | (15) |
| 1.337 Å | (40) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 2: Planetesimal differentiation and alteration | 4.566-4.550 |
| 6 : Secondary asteroid phases | 4.566-4.560 |
Type Occurrence of Xieite
General Appearance of Type Material:
Compact polycrystalline aggregates of about 5-40 µm in grain size and commonly displays as pseudomorph of chromite crystals or its fragments.
Place of Conservation of Type Material:
Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou Province, China.
Geological Setting of Type Material:
Shock-produced veins of Suizhou L6 chondrite formed through solid-state transformation of chromite, and its occurrence is intimately associated with the shock veins of meteorite.
Associated Minerals at Type Locality:
Synonyms of Xieite
Other Language Names for Xieite
Simplified Chinese:谢氏超晶石
Relationship of Xieite to other Species
Member of:
Other Members of this group:
| Chenmingite | FeCr2O4 | Orth. mmm (2/m 2/m 2/m) : Pnma |
| Ellinaite | CaCr2O4 | Orth. mmm (2/m 2/m 2/m) : Pnma |
| Harmunite | CaFe2O4 | Orth. mmm (2/m 2/m 2/m) : Pbcm |
| Marokite | CaMn3+2O4 | Orth. |
| Tschaunerite | (Fe2+)(Fe2+Ti4+)O4 | Orth. mmm (2/m 2/m 2/m) : Cmcm |
| Wernerkrauseite | Ca(Fe3+,Mn3+)2Mn4+O6 | Orth. mmm (2/m 2/m 2/m) : Pnma |
Common Associates
Associated Minerals Based on Photo Data:
| 1 photo of Xieite associated with Forsterite | Mg2SiO4 |
| 1 photo of Xieite associated with Lingunite | (Na,Ca)AlSi3O8 |
| 1 photo of Xieite associated with Majorite | Mg3(MgSi)(SiO4)3 |
| 1 photo of Xieite associated with Ringwoodite | (Mg,Fe2+)2SiO4 |
Related Minerals - Strunz-mindat Grouping
| 4.BB. | Elgoresyite | (Mg5Si2)O9 |
| 4.BB. | Chenmingite | FeCr2O4 |
| 4.BB. | Dellagiustaite | V2+Al2O4 |
| 4.BB. | Thermaerogenite | CuAl2O4 |
| 4.BB. | Chukochenite | LiAl5O8 |
| 4.BB. | Garpenbergite | Mn6◻AsSbO10(OH)2 |
| 4.BB. | Magnéliite | Ti3+2Ti4+2O7 |
| 4.BB. | Jianmuite | ZrTi4+Ti3+5Al3O16 |
| 4.BB.05 | Chromite | Fe2+Cr3+2O4 |
| 4.BB.05 | Cochromite | CoCr2O4 |
| 4.BB.05 | Coulsonite | Fe2+V3+2O4 |
| 4.BB.05 | Cuprospinel | Cu2+Fe3+2O4 |
| 4.BB.05 | Filipstadite | (Fe3+0.5Sb5+0.5)Mn2O4 |
| 4.BB.05 | Franklinite | Zn2+Fe3+2O4 |
| 4.BB.05 | Gahnite | ZnAl2O4 |
| 4.BB.05 | Galaxite | Mn2+Al2O4 |
| 4.BB.05 | Hercynite | Fe2+Al2O4 |
| 4.BB.05 | Jacobsite | Mn2+Fe3+2O4 |
| 4.BB.05 | Manganochromite | Mn2+Cr2O4 |
| 4.BB.05 | Magnesiocoulsonite | MgV2O4 |
| 4.BB.05 | Magnesiochromite | MgCr2O4 |
| 4.BB.05 | Magnesioferrite | MgFe3+2O4 |
| 4.BB.05 | Magnetite | Fe2+Fe3+2O4 |
| 4.BB.05 | Nichromite | (Ni,Co,Fe)(Cr,Fe,Al)2O4 |
| 4.BB.05 | Qandilite | (Mg,Fe3+)2(Ti,Fe3+,Al)O4 |
| 4.BB.05 | Spinel | MgAl2O4 |
| 4.BB.05 | Trevorite | Ni2+Fe3+2O4 |
| 4.BB.05 | Ulvöspinel | TiFe2+2O4 |
| 4.BB.05 | Vuorelainenite | Mn2+V3+2O4 |
| 4.BB.05 | Zincochromite | ZnCr2O4 |
| 4.BB.05 | Harmunite | CaFe2O4 |
| 4.BB.05 | Wernerkrauseite | Ca(Fe3+,Mn3+)2Mn4+O6 |
| 4.BB.05 | Deltalumite | (Al0.67◻0.33)Al2O4 |
| 4.BB.05 | Guite | Co2+Co3+2O4 |
| 4.BB.10 | Hausmannite | Mn2+Mn3+2O4 |
| 4.BB.10 | Hetaerolite | ZnMn2O4 |
| 4.BB.10 | Manganostibite | (Mn,Fe)7SbAsO12 |
| 4.BB.15 | Maghemite | (Fe3+0.67◻0.33)Fe3+2O4 |
| 4.BB.15 | Titanomaghemite | (Ti4+0.5◻0.5)Fe3+2O4 |
| 4.BB.20 | Tegengrenite | (Mn3+0.5Sb5+0.5)Mg2O4 |
| 4.BB.30 | Carmeltazite | ZrAl2Ti4O11 |
| 4.BB.35 | Feiite | Fe2+2(Fe2+Ti4+)O5 |
| 4.BB.40 | Maohokite | MgFe2O4 |
| 4.BB.45 | Tschaunerite | (Fe2+)(Fe2+Ti4+)O4 |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Xieite
mindat.org URL:
https://www.mindat.org/min-35792.html
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References for Xieite
Reference List:
Localities for Xieite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Antarctica | |
| Kato et al. (2017) |
Brazil | |
| Kaminski et al. (2017) +1 other reference |
China (TL) | |
| Chen et al. (2003) +3 other references |
Quick NavTopAbout XieiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Suizhou meteorite, Xihe, Zengdu District, Suizhou, Hubei, China