O3 Yb2 Zachariasen W Norsk Geologisk Tidsskrift 9 (1927) 310-316 The crystal structure of the modification C of the sesquioxides of the rare earth metals, and of indium and thallium. _cod_database_code 1010332 _database_code_amcsd 0017258 10.39 10.39 10.39 90 90 90 I2_13 atom x y z Yb1 .25 .25 .25 Yb2 .021 0 .25 Yb3 .542 0 .25 O1 .125 .135 .395 O2 .1 .358 .373