Zeeman Effect on the Quadrupole Spectra of Sodium, Potassium, and Barium Chlorates

All features of the Zeeman pattern of NaClO3 that were examined can be deduced from the crystal symmetry and knowledge of the orientation of the crystal axes in the magnetic field. The crystal axes could be located with respect to the magnet goniometer to within 0.05° by observation of the Zeeman pattern. The line width was found to be 1.2 kc between flexes. A method was devised for orienting KClO3 and Ba(ClO3)2·H2O crystals by attaching a NaClO3 crystal and observing its Zeeman pattern. In KClO3, the field gradient tensor asymmetry parameter η was found to be about 0.006 and the z-principal axis was located and compared with features of the structure. The line, one of the sharpest yet observed, measured 0.29 kc between flexes. In Ba(ClO3)2·H2O, the upper limit for η was found to be 0.05. The z-principal axes were located and compared with features of the crystal structure. The line width was found to be about 3 kc.