Xieite

 Xieite is an iron chromium oxide mineral with formula Fe²⁺Cr₂O₄. It is a member of the spinel group and a high pressure polymorph of chromite.^[2]

Xieite
General
Category	Oxide minerals
Formula (repeating unit)	Fe2+Cr2O4
Strunz classification	4.BB.25
Crystal system	Orthorhombic
Crystal class	Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
Space group	Bbmm
Unit cell	a = 9.462(6) Å b = 9.562(9) Å c = 2.916(1) Å: Z = 4
Identification
Formula mass	453.91 g/mol
Color	Golden yellow
Specific gravity	5.63
References

It was discovered in samples taken from the Suizhou meteorite which fell in 1986 in the Zengdu District of China.

This article uses material from the Wikipedia article  Metasyntactic variable, which is released under the  Creative Commons Attribution-ShareAlike 3.0 Unported License.