| Barium Chromite, BaCr2O4, is obtained as a dense green crystalline powder by heating a mixture of potassium dichromate and barium chloride to redness. By heating together chromium sesquioxide and barium oxide in the electric furnace a polychromite, BaO.4Cr2O3, is produced, even when excess of baryta is present. It forms a greenish-brown powder of density 5.4 at 15° C. |