Lattice Constants of Gallium at 297° K


THE a and b lattice constants of gallium (orthorhombic, D182hAbma) are almost identical and have often been a source of confusion, as has recently been emphasized by Yaqub and Cochran1. Diffractometer data at 4.2° K (ref. 2) (gallium of 99.9999 per cent grade) indicated a = 4.5156 Å, b = 4.4904 Å, c = 7.6328 Å, but at 297° K it appeared that a is smaller than b (in disagreement with Bradley3), and therefore that at an intermediate temperature (near 255° K) a should become equal to b.


  1. 1

    Yaqub, M., and Cochran, J. F., Phys. Rev., 137, A, 1182 (1965).

  2. 2

    Barrett, C. S., Advances in X-ray Analysis, 5, 33 (Pitman, 1961).

  3. 3

    Bradley, A. J., Z. Krist., 91, A, 302 (1935).

  4. 4

    Spooner, F. J., M.Sc. thesis (Univ. London 1964).

  5. 5

    Wilson, C. G., and Spooner, F. J., Nature, 198, 1052 (1963).

  6. 6

    Cochran, J. F. (personal communication).

  7. 7

    Powell, R. W., Nature, 164, 153 (1949); 166, 1110 (1950).

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BARRETT, C., SPOONER, F. Lattice Constants of Gallium at 297° K. Nature 207, 1382 (1965).

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