Cobalt metagermanate

Cobalt metagermanate is one of the germanates of cobalt, with chemical formula CoGeO3. It is paramagnetic at room temperature and turns antiferromagnetic at or below 32±1 K. It exists in two crystal forms, the orthorhombic and the monoclinic. It can be prepared by the reaction of cobalt(II,III) oxide (or cobalt(II) hydroxide ) and germanium dioxide at high temperatures. The chemical vapor phase transfer method can also be used for its preparation.