Parting of Minerals

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Parting of Minerals

 

the ability of mineral crystals or crystalline grains to split along certain more or less parallel planes. The parting of minerals differs from mineral cleavage in that the splitting occurs at points of irregularity in the mineral’s structure. The planes of mineral parting may be the boundaries of twinning, shear joints created by the mechanical deformation of crystals, or planes caused by parallel microintergrowth of fine layers of one mineral in another. Mineral parting occurs in corundum, hematite, the pyroxenes (diallage), pyrite, and magnetite.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.