Atoms at the eight corners and one in the center of a cube.
Interlocking tetrahedral structure typical of carbon.
Hexagonal packing with ABAC stacking sequence.
Atoms at the corners and in the center of each face.
Sixfold symmetry with axes at 120° and 90°.
Most dense packing of equal spheres with ABAB stacking.
Single non-orthogonal axis angle.
Three unequal orthogonal axes.
Three equal axes at identical non-right angles.
Primitive cubic lattice with atoms only at the corners.
Two equal orthogonal axes and one different axis.
No orthogonal axes or equal axis lengths.
Comprehensive classification of unit cell geometries and specific packing symmetries.