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: Fhyd2 _database_code_amcsd 0015441 5.958 5.958 8.965 90 90 120 P6_3mc atom x y z occ Uiso Fe1 .1688 .8312 .6356 1.01 .008 Fe2 1/3 2/3 .3414 .90 .008 Fe3 1/3 2/3 .9538 .85 .008 OH1 0 0 .0147 .014 O2 1/3 2/3 .7353 .014 O3 .1671 .8329 .2547 .014 O4 .5238 .4762 .0053 .014