John G. Kester Created 2026-10-20 Updated 2026-11-05
A crystal structure specifies the chemical species and spatial arrangement of the chemical atoms or ions in a crystal. For an ideal periodic structure, separate two ingredients: a Bravais lattice specifies the translations that repeat the arrangement, and an atomic basis of a crystal specifies the chemical motif repeated at every lattice point. The outward shape, or crystal habit, is a different description: the internal arrangement is what this article describes.
Inorganic Chemistry 28, 1087–1091. Synthesis of the diphosphaborane and crystallographic identification of an amine-substituted phosphaborane side product. A count of boron NMR signals alone is not a substitute for its positional structure determination.