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Xiande Xie
Specific Gravity:
Crystal System:
Member of:
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.
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.

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Classification of XieiteHide

Approval Year:
First Published:
Approval History:
IMA 2007-056

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 XieiteHide

harder than chromite
5.63 g/cm3 (Measured)    5.342 g/cm3 (Calculated)

Chemical Properties of XieiteHide

IMA Formula:

Crystallography of XieiteHide

Crystal System:
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
a:b:c = 0.99 : 1 : 0.305
Unit Cell V:
263.8 ų
space group Bbmm

X-Ray Powder DiffractionHide

Powder Diffraction Data:
2.675 (100)
2.389 (20)
2.089 (10)
1.953 (90)
1.566 (60)
1.439 (15)
1.425 (15)
1.337 (40)

Type Occurrence of XieiteHide

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.
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 XieiteHide

Other Language Names for XieiteHide

Simplified Chinese:谢氏超晶石

Relationship of Xieite to other SpeciesHide

Member of:
Other Members of this group:
Nichromite(Ni,Co,Fe)(Cr,Fe,Al)2O4Iso. m3m (4/m 3 2/m) : Fd3m

Related Minerals - Nickel-Strunz GroupingHide

4.BB.ChenmingiteFeCr2O4Orth. mmm (2/m 2/m 2/m) : Pnma
4.BB.ThermaerogeniteCuAl2O4Iso. m3m (4/m 3 2/m) : Fd3m
4.BB.05ChromiteFe2+Cr3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
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.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.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.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.10IwakiiteMn2+Fe3+2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
4.BB.15MaghemiteFe3+2O3Iso. 4 3 2 : P41 3 2
4.BB.15TitanomaghemiteFe3+(Fe3+,Ti4+,Fe2+,◻)2O4Iso. 4 3 2 : P43 3 2

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 XieiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Chen, M., Shu, J., Xie, X., Mao, H. (2003) Natural CaTi2O4-structured FeCr2O4 polymorph in the Suizhou meteorite and its significance in mantle mineralogy. Geochimica et Cosmochimica Acta: 67: 3937-3942.
Chen, M., Shu, J., Mao, H., Xie, X., Hemley, R.J. (2003) Natural occurrence and synthesis of two new postspinel polymorphs of chromite. Proceedings of the National Academy of Science USA: 100: 14651-14654.
Chen, M., Shu, J., Mao, H. (2008) Xieite, a new mineral of high pressure FeCr2O4 polymorph. Chinese Science Bulletin: 53: 3341-3345.
Xie, X., Chen, M., Wang, C. (2011) Occurrence and mineral chemistry of chromite and xieite in the Suizhou L6 chondrite. Science China Earth Sciences: 54(7): 998-1010.
Xie, X., Chen, M. (2016) Suizhou Meteorite: Mineralogy and Shock Metamorphism. Springer Geochemistry/Mineralogy: 255 pgs.

Internet Links for XieiteHide

Localities for XieiteHide

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.
  • Mato Grosso
    • Juína
      • Sorriso river
Kaminski, F., Wirth R. (2017): Nitrides and carbonitrides from the lowermost mantle and their importance in the search for Earth’s "lost" nitrogen. American Mineralogist: 102 (in press); (2017)
China (TL)
  • Hubei
    • Suizhou
      • Zengdu District (Cengdou District)
        • Xihe
Chen, M., Shu, J., Xie, X., Mao, H. (2003): Natural CaTi2O4-structured FeCr2O4 polymorph in the Suizhou meteorite and its significance in mantle mineralogy. Geochimica et Cosmochimica Acta, 67, 3937-3942; IMA website; Chen, M., Shu, J., & Mao, H. K. (2008). Xieite, a new mineral of high-pressure FeCr2O4 polymorph. Chinese Science Bulletin, 53(21), 3341-3345.; Chen, M., & Xie, X. (2015). Shock-produced akimotoite in the Suizhou L6 chondrite. Science China Earth Sciences, 58(6), 876-880.
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