Alternatively, it may be prepared via the reduction of copper(II) acetate with hydrazine:[4] Aqueous cuprous chloride solutions react with base to give the same material.These sugars reduce an alkaline solution of a copper(II) salt, giving a bright red precipitate of Cu2O.It forms on silver-plated copper parts exposed to moisture when the silver layer is porous or damaged.The structure thus resembles in some sense the main polymorphs of SiO2, but cuprous oxide's lattices interpenetrate.Another unusual feature of the ground state excitons is that all primary scattering mechanisms are known quantitatively.[11] In December 2021, Toshiba disclosed a transparent cuprous oxide (Cu2O) thin-film solar cell.
Copper(I) oxide unit cell
Pourbaix diagram
for copper in uncomplexed media (anions other than OH
−
not considered). Ion concentration 0.001 mol/kg water. Temperature 25 °C.
Large crystal of the mineral form of copper(I) oxide (
cuprite
).