Patent ID: 7087688

Claim:
A MgCl 2 ·mEtOH·nH 2 O adduct, wherein 3.4<m≦4.4, 0<n≦0.7, the adduct having an X-ray diffraction spectrum comprising at least one diffraction line at each diffraction angle 2θ of 9.3±0.2° and 9.9±0.2° with each diffraction angle being between 5° and 10°, the diffraction line at diffraction angle 2θ of 9.3±0.2° being more intense than the diffraction line at diffraction angle 2θ of 9.9±0.2°, and the diffraction line at diffraction angle 2θ of 9.9±0.2° being less than 0.4 times as intense as the diffraction line at diffraction angle 2θ of 9.3±0.2°.