A Basic Course in Crystallography

2-fold axis 32 point groups arrangement body-centred Bravais lattice c-axis calculated called cations centre of symmetry close packing coincide colours combination consider corresponding crystal classes crystal structure crystal systems crystallographic axes cube cubic system density diffraction pattern distance electron beam electron diffraction faces film glide planes goniometer hence identi-points intensity interfacial angle intersection ions lattice points lattice types Laue layer length light Miller indices mirror plane molecules monoclinic NaCl neutron diffraction octahedral voids optic orthonet orthorhombic parallel perpendicular photograph point groups polarized position possible primitive prism properties radius ratio rays reciprocal lattice reflection refractive index rhombohedral rotation axis screw axis shown in Fig silicates single crystal solids space groups space lattice stacking vector stereographic projection symbol symmetry axes symmetry elements symmetry operation Table Tetragonal tetrahedral tetrahedral voids tetrahedron tetranet thermal translation triclinic twins unit cell values vibration directions wavelength waves