Tootfinder

In mineralogy, a #polycrystal
(or polycrystalline material)
refers to a solid composed of multiple small, intergrown crystals (crystallites) of the same or different minerals,
arranged in a random or oriented fashion.
Unlike a single crystal, which has a continuous and unbroken atomic lattice,
a polycrystal consists of many smaller crystalline grains separated by grain bo…

Polycrystals
Mineral Matters #767