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Figure 2
Part of the (001) section of a lattice whose conventional cell is of type P (top) or C (bottom), with the traces (solid lines) of (hk0) planes with h and k having the same parity (h = k = 1 in this figure). The axes and boundaries of the conventional cell are drawn as dotted lines. Nodes centring the unit cell in oC are shown in red to emphasize the difference between the two unit cells. The interplanar distance d(hk0) is the same in the two lattices, but in oC the density of nodes on each plane of the family is doubled with respect to oP. The first plane of the family passes through lattice nodes 100 and 010 in both cases, as well as through lattice node [{1 \over 2} {1 \over 2} 0] in the case of oC, which in this family does not give rise to any additional plane with respect to oP. The same conclusions are obtained by drawing any other (hk0) family with the same parity of h and k, like for example (310) or (150).

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 48| Part 4| August 2015| Pages 1290-1298
https://doi.org/10.1107/S1600576715011206
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