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The x-ray diffraction pattern of the material, taken with CuK**ya radiation, indicated the presence of no extra lines and was in good agreement with the pattern of Douglass.

Magnetic analyses by R. G. Meisenheimer of this laboratory indicated no ferromagnetic impurities.

Af was found to be paramagnetic with three unpaired electrons per chromium atom and a molecular susceptibility of Af, where Af.

For exactly three unpaired electrons the coefficient would be 3.10.

An infrared spectrum, obtained by H. A. Benesi and R. G. Snyder of this laboratory, showed bands in the positions found by Jones.