Ferrihydrite Michel F M, Ehm L, Antao S M, Lee P L, Chupas P J, Liu G, Strongin D R, Schoonen M A A, Phillips B L, Parise J B Science 316 (2007) 1726-1729 The structure of ferrihydrite, a nanocrystalline material Locality: synthetic Sample: Fhyd3 _database_code_amcsd 0015440 5.953 5.953 9.096 90 90 120 P6_3mc atom x y z occ Uiso Fe1 .1688 .8311 .6358 .010 Fe2 1/3 2/3 .3347 .94 .010 Fe3 1/3 2/3 .9600 .93 .010 OH1 0 0 .0460 .008 O2 1/3 2/3 .7651 .008 O3 .1670 .8329 .2457 .008 O4 .5258 .4742 .9778 .008