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Summary The lattice parameters of ten elements, each possessing cubic symmetry, were measured by a precision X-ray method. Four of the elements were spectroscopically pure and the others were of a high degree of purity. The lattice parameters at 18°C. were found to be as follows:—Au 4·0699±0·0003 Å. ; Pt 3·9158±0.0003; Pd 3·8824±0·0003; Rh 3·7957±0·0003; Pb 4·9396±0·0003; Ir 3·8312±0·00055; Fe 2·86075-0·0002; Al 4·04065±0·0002; Cu 3·60775±0·0002; Ag 4·07724 ±0·0002. The values have been corrected for deviation from Bragg's Law. The crystal densities of the materials at 0° C. and 20° C. were calculated from the above parameters.
Owen et al. (1933) studied this question.