Crystal Structures: A Working Approach

Acta Cryst amplitude anions aristotype Atomic coordinates atomic positions atoms axes of reference body-centred bond lengths broken lines cation cavity centre of symmetry changes Chapter close-packed compounds consider coordination number corners covalent cristobalite crystal cube cubic diad diad axis diagram dipole direction disorder displacive transitions distortion electrostatic valence energy example formula units framework geometrical give glide plane H atoms hence hettotype hexagonal hydrogen bonds interatomic distances inversion ionic isomorphous lattice complex lattice parameters lattice points layer linkage pattern mirror plane monoclinic neighbours Number of formula octahedra octahedron off-centre open circles orientation origin orthorhombic oxygen atoms packing parallel perovskite perpendicular Phase point group polarisation polyhedra position parameters predict primitive unit cell projection radii radius rhombohedral rotation diads shown in Figure space group space-group symbol special positions spinel structure symmetry elements Table tetragonal tetrahedra triad axis tridymite unit cell units per unit values water molecules zero