Chemical reactions can result in the formation or dissociation of molecules, that is, molecules breaking apart to form two or more smaller molecules, or rearrangement of atoms within or across molecules.

See also Benzaldehyde Benzil Benzilic acid rearrangement Benzoin References External links Safety MSDS data Benzilic acid as nerve agent precursor Benzilic acid as a reagent in gravimetric determination of zirconium Solubility in alcohols Converting Benzaldehyde to Benzilic Acid Synthesis of Benzilic Acid

This is thought to occur as a result of rearrangement of atoms in olivine (which constitutes a large portion of peridotite) at a depth of 410 km, to form a denser crystal structure as a result of the increase in pressure with increasing depth.

Derived classifications may be prepared either by adopting the reference classification structure and categories and then possibly providing additional detail beyond that provided by the reference classification, or they may be prepared through the rearrangement or aggregation of items from one or more reference classifications.