Mössbauer Spectrum of Iron-57 in Iron Metal at Very High Pressures

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Science  13 Sep 1963:
Vol. 141, Issue 3585, pp. 1035-1038
DOI: 10.1126/science.141.3585.1035


The effect of pressure on the Mössbauer spectrum of Fe57 in iron metal has been studied as the pressure was increased presumably to more than 140 kbar. At pressures up to 120 kbar, a six-line spectrum characteristic of α-iron was observed. At 140 kbar, a seventh line appeared in the spectrum at -0.12 ± 0.06 mm/sec relative to stainless steel. This line was attributed to the appearance of the high-pressure phase of iron.