decompaction

de- +‎ compaction

• (UK) IPA^(key): /diːkəmˈpækʃən/

decompaction (countable and uncountable, plural decompactions)

1. (chiefly in geology, biochemistry) The act or process of making something less compact; often specifically the reversal of previous compaction
   • 1995, Georgiy P. Zaraisky, Victor N. Balashov, “Thermal Decompaction of Rocks”, in Shmulovich et al., editors, Fluids in the Crust‎, →ISBN, page 254:

     As a result of decompaction, the permeability of low-porosity rocks may increase by several orders of magnitude.

• decompact
• decompactor