Not covered by the topic are many phenomena: phase transitions, dynamics of biomolecules (docking, folding), and sonochemistry.
[2][3] In natural environments, mechanochemical reactions are frequently induced by physical processes such as earthquakes,[4] glacier movement[5] or hydraulic action of rivers or waves.
In extreme environments such as subglacial lakes, hydrogen generated by mechnochemical reactions involving crushed silicate rocks and water can support methanogenic microbial communities.
And mechanochemistry may have generated oxygen in the ancient Earth by water splitting on fractured mineral surfaces at high temperatures, potentially influencing life's origin or early evolution.
[6] The primal mechanochemical project was to make fire by rubbing pieces of wood against each other, creating friction and hence heat, triggering combustion at the elevated temperature.
Another method involves the use of flint and steel, during which a spark (a small particle of pyrophoric metal) spontaneously combusts in air, starting fire instantaneously.
As glaciers move downslope, they abrade rocks, generating fractured mineral surfaces that can partake in mechanochemical reactions.
[12][13] Ball milling and ResonantAcoustic Mixing (RAM) are widely used processes in which mechanical force is used to achieve chemical transformations.
(Poly)lactic acid, a green material, can be upcycled into alkyl lactate esters by mechanochemistry, using alcohol as a reaction partner under resonant acoustic mixing.