Abstract
Examination of properties of the phenazine- N -oxyphenazine system has revealed that abnormal behaviour is observed approximately in a region of composition between 10 and 40 mole % N -oxyphenazine. This is consistent with the suggestion of the presence of a miscibility gap. The composition of the eutectic seems to be about 28 mole % N -oxyphenazine. Data are given for melting points, morphologies, refractive indices, unit-cell dimensions, packing densities, densities and thermal expansion coefficients.