The compressibility of FeO measured by energy dispersive X-ray diffraction in a diamond anvil squeezer up to 200 kbar

The compressibility of Fe_0.941O has been measured by energy-dispersive X-ray diffraction methods in a diamond anvil squeezer up to 200 kbar. The data points can be described by the Murnaghan equation with K ₀=1,540±50 kbar and K'=4. An analysis of previous investigations, X-ray diffraction and ultrasonic measurements yields for the general composition Fe_1?xO a regression line K ₀=5,438(1?x)?3,595 kbar for all known measurements.