1. Fowler, R. H., and Guggenheim, E. A., "Statistical Thermodynamics", § 808, and following.
2. Eisenstein, A., and Gingrich, N. S. (Bull. Amer. Phys. Soc., 15, No. 2; April 1940) in a preliminary report give 7 atoms at 3.9 A. as nearest neighbours. This result, which seems rather difficult to reconcile with the theoretical predictions, was obtained with an experimental arrangement different from ours and in a different p-T range. It might be pointed out that at higher molal volume the curves of Rice3 indicate a possible change in co-ordination, but scarcely so low as the preliminary results of these authors indicate.
3. Fowler and Guggenheim, loc. cit., and Rice, O. K., J. Chem. Phys., 7, 136 and 883 (1939).