1369. ---------------. [HAUL, R., AND SCHOON, T.] [Structure of Ferromagnetic Ferric Oxides; ?-Fe2O3.] Ztschr. physik. Chem., vol. B-44, 1939, pp. 216-226; Chem. Abs., vol. 34, 1940, p. 666.

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Literature Abstracts

1369. ---------------. [HAUL, R., AND SCHOON, T.] [Structure of Ferromagnetic Ferric Oxides; γ-Fe₂O₃.] Ztschr. Physik. Chem., vol. B-44, 1939, pp. 216-226; Chem. Abs., vol. 34, 1940, p. 666.

X-ray studies of γ-Fe₂O₃ prepared from Fe₃O₄, from an Fe arc, and from Fe(CO)₅ resulted in the values, a_w=8.316±0.004, 8.333±0.004 and 8.3Å, respectively. No essential difference was found in lattice constant or intensity distribution in the 3 samples. Both X-ray and electron-diffraction powder diagrams showed new interference patterns. They can be explained on the assumption of lower symmetry or a larger elementary cell. Similar results were found in Al₂O₃.

HAWK, C. O. See abs. 3210, 3214, 3215, 3297.