Goethite Gualtieri A, Venturelli P American Mineralogist 84 (1999) 895-904 In situ study of the goethite-hematite phase transformation by real time synchrotron powder diffraction Sample at T = 25 C _database_code_amcsd 0002226 9.9134 3.0128 4.5800 90 90 90 Pnma atom x y z Uiso Fe .1459 .25 -.0486 .049 H -.101 .25 -.399 .06 O1 -.1990 .25 .285 .046 O2 -.0517 .25 -.196 .046