Tapiolite-(Fe) von Heidenstam O Arkiv for Kemi 28 (1968) 375-387 Neutron and X-ray diffraction studies on tapiolite and some synthetic substances of trirutile structure Note: Crystal A Note: Curran spectrometer _database_code_amcsd 0017873 4.7515 4.7515 9.254 90 90 90 P4_2/mnm atom x y z occ Biso Fe 0 0 0 1.08 Nb 0 0 .3341 .10 1.17 Ta 0 0 .3341 .90 1.17 O1 .2982 .2982 0 .66 O2 .3001 .3001 .3289 1.00