International
Tables for Crystallography Volume A Spacegroup symmetry Edited by M. I. Aroyo © International Union of Crystallography 2015 
International Tables for Crystallography (2015). Vol. A, ch. 1.5, p. 81


Figure 1.5.1.5
Tetragonal lattices, projected along . (a) Primitive cell P with a, b, c and the Ccentred cells with and with . The origin for all three cells is the same. (b) Bodycentred cell I with a, b, c and the Fcentred cells with and with . The origin for all three cells is the same. The fractions indicate the height of the lattice points along the axis of projection. 