Letter | Published:

Oriented Overgrowth of Alkali Halides on Metals

Naturevolume 166pages189190 (1950) | Download Citation



IN a recent discussion of oriented overgrowth, Sir George Thomson1 has pointed out that near equality of spacing of atoms in the two crystals in contact is not always a necessary condition for such growth to occur. It appeared that the presence of cracks or steps in the mother crystal plays an important part. Some evidence for this belief was the observation of Andrade and Martindale2 that small crystals of gold or silver grown on glass and diamonds show a preference for nucleation on cracks or scratches on the surface.

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  1. 1

    Thomson, G. P., Proc. Phys. Soc., 61, 403 (1948).

  2. 2

    Andrade, E. N., and Martindale, J. C., Phil. Trans. Roy. Soc., 235, 69 (1936).

  3. 3

    Royer, L., Bull. Soc. Franc. Miner., 51, 7 (1928).

  4. 4

    Sloat, C. A., and Menzies, A. W. C., J. Phys. Chem., 35, 2005 (1931).

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  1. Brookhaven National Laboratory, Upton, Long Island, N.Y.

    • G. W. JOHNSON


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