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X-ray powder diffraction at reflector mode 3°–50° 2θ (deg), scan speed 10° 2θ (deg)min, step size 0.02θ (deg). Acceleration voltage 45 kV and 15 mA current. KET spray dried from a solution and suspension vs the crystalline substance. Solvent system 1:1 ethanol:water, PVA 4-88 as polymer. Solution: 14% DL KET, suspension: 30% DL KET.
