V2O3 has the corundum structure. It is antiferromagnetic with a critical temperature of 160 K.  At this temperature there is an abrupt change in conductivity from metallic to insulating. This also distorts the crystal structure to a monoclinic space group: C2/c.
V2O3 has an aluminum oxide-like structure. It displays antiferromagnetic properties with a critical temperature of 160 K, resulting in a sudden change from metallic to insulating conductivity. This also affects the crystal structure into a monoclinic space group: C2/c.