Hexaferrum
The hexagonal close-packed phase of iron — epsilon iron — stable only at extreme pressures and found in meteorites.
Intro adapted from Wikipedia (CC BY-SA).
Hexaferrum is an IMA-recognized mineral species in the native element class, with the chemical formula (Fe,Os,Ru,Ir).
It crystallizes in the hexagonal crystal system (space group P6_3/mmc).
IMA symbol Hfe, IMA status: approved, named in 1995.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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