beta iron

The A forms the low-temperature boundary of the beta iron field in the phase diagram in Figure 1.

The term beta iron is not any longer used because it is crystallographically identical to, and its phase field contiguous with, α-Fe.

Saxena, Dubrovinsky et al. of Uppsala University observed x-ray diffraction (XRD) evidence of a high-pressure, high-temperature phase they designated as beta iron (β-Fe).