  Electrolysis has been performed on a fused mixture of magnesium chloride,
potassium chloride, and magnesium borate at 600 oC under an Ar atmosphere using
a graphite anode and a Pt cathode. Magnetic measurements and X-ray
diffractometry have revealed that the resultant deposit on the cathode contains
a few tens molar percent of MgB2. A voltanmetric measurement at the initial
stage of electrolysis has shown that the threshold cathode voltage for the
formation of MgB2 from the molten salts is -1.6 V.
