Abstract
IT has been shown that slight deformations occur in the crystal structures of various oxides of the iron group. B. Ruhemann1 has found that there is a very slight change in the crystal structure of MnO near 120° K. Rooksby2 and Tombs and Rooksby3 have reported that the face-centred, cubic arrangements in MnO, FeO, CoO and NiO show changes to tetragonal or rhombohedral symmetry upon cooling through a transition temperature.
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References
Ruhemann, B., Phys. Z. U.S.S.R., 7, 590 (1935).
Rooksby, H. P., Nature, 152, 304 (1943); Acta Cryst., 1, 226 (1948).
Tombs, N. C., and Rooksby, H. P., Nature, 165, 442 (1950).
Bizette, H., Ann. Physique, 1, 300 (1946). Foëx, M., and LaBlanchetais, C. H., C.R. Acad. Sci., Paris, 228, 1579 (1949).
Shockley, W., Tech. Pub. Bell Tel. System, 18, 645 (1939). Bozorth, R. M., ibid., 19, 1 (1940).
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GREENWALD, S., SMART, J. Deformations in the Crystal Structures of Anti-ferromagnetic Compounds. Nature 166, 523–524 (1950). https://doi.org/10.1038/166523a0
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DOI: https://doi.org/10.1038/166523a0
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