Chemistry:Iron pentahydride

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Iron pentahydride FeH5 is a superhydride compound of iron and hydrogen, stable under high pressures. It is important because it contains atomic hydrogen atoms that are not bonded into smaller molecular clusters, and may be a superconductor. Pairs of hydrogen atoms are not bonded together into molecules. FeH5 has been made by compressing a flake of iron with hydrogen in a diamond anvil cell to a pressure of 130 GPa and heating to below 1500K.[1] When decompressed to 66 GPa it decomposes to solid FeH3. The unit cell is tetragonal with symmetry I4/mmm.[2]

See also


  1. Pépin, C. M.; Geneste, G.; Dewaele, A.; Mezouar, M.; Loubeyre, P. (28 July 2017). "Synthesis of FeH5: A layered structure with atomic hydrogen slabs" (in en). Science 357 (6349): 382–385. doi:10.1126/science.aan0961. ISSN 0036-8075. PMID 28751605. Bibcode2017Sci...357..382P. 
  2. "Synthesis of FeH5 under pressure: Dense atomic metal hydrogen stabilised with Fe" (in en). Spotlight on Science (European Synchrotron Radiation Facility). 27 July 2017.