Pharmacosiderite Mills S J, Hager S L, Leverett P, Williams P A, Raudsepp M Mineralogical Magazine 74 (2010) 487-492 The structure of H3O+ - exchanged pharmacosiderite Locality: Cornwall, England _database_code_amcsd 0014604 7.980 7.980 7.980 90 90 90 P-43m atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Fe .1429 .1429 .1429 .015 .015 .015 .015 -.002 -.002 -.002 As .5 0 0 .023 .012 .029 .029 0 0 0 O1 .1230 .1230 .3829 .025 O2 .8868 .8868 .8868 .013 O3 .5 .069 .5 .5 .057 O4 .694 .694 .694 .5 .048