Bragg, William Henry, Sir, 1862-1942, Bragg, William Lawrence, Sir, 1890-1971 · London : G. Bell · leaf 164
, fourfold axes of symmetry, and acentre of symmetry. A consideration of the structure in Fig. 45 showsthat there are no reflection planes of symmetry or … Fig. 45. rotation axes of symmetry which could give rise tothe holohedral symmetry of the crystal as a whole.Their places are taken by glide planes of symmetryand screw axes of symmetry. Two of the fourfoldscrew axes are marked in Fig. 45 ; it will be seen how 148 CRYSTAL SYMMETRY AND THE the…
Crystallography · X-rays
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