The crystal structure of a high-pressure Fe 3 O 4 phase was determined by in situ X-ray diffraction measurements at high pressure and temperature, using an imaging plate detector and monochromatic synchrotron X-radiation. The high-pressure phase has the Pbcm space group (CaMn 2 O 4 -type structure) with cell parameters a = 2.7992(3) Aa, b = 9.4097(15) Aa, and c = 9.4832(9) Aa at 23.96 GPa and 823 K. Fe (super 3+) occupies an octahedral site and Fe (super 2+) is in an eightfold-coordinated site described as a bicapped trigonal prism. The high-pressure CaMn 2 O 4 -type Fe 3 O 4 phase is about 6.5% more dense than the spinel form at 24 GPa.
In situ structure determination of the high-pressure phase of Fe 3 O 4
- Share Icon Share
- Search Site
Yingwei Fei, Daniel J. Frost, Ho-Kwang Mao, Charles T. Prewitt, Daniel Haeusermann; In situ structure determination of the high-pressure phase of Fe 3 O 4. American Mineralogist ; 84 (1-2): 203–206. doi: https://doi.org/10.2138/am-1999-1-222
Download citation file: