bond compression

Bond compression is a fundamental aspect of how materials respond to high pressure. When subjected to stress, materials typically reduce in volume, leading to shorter interatomic distances. This compression can occur through several mechanisms, including bond compression, which is the direct shortening of the bonds between atoms.12

The extent to which a bond compresses depends on its strength. Strong covalent bonds, like those in diamond, are highly resistant to compression, while weaker bonds in materials like alkali halides are much more compressible. This differential compressibility can lead to anisotropic effects, where materials compress differently in various directions, particularly in layered or chain-like structures. In some cases, compression can also involve bending of bond angles between atoms, which can cause a greater volume change than bond shortening alone.1