摘要
Ⅰ. EXPERIMENTAL Magnesium tetraborate, MgB4O7·9H2O was synthesized from grade A. R. reagents. Its composition is (wt%) MgO 11.83, B2O3 40.76, H2O 47.43, B2O3/MgO (mole ratio) 1.995. It was identified as hungtsaoite (MgB4O7·9H2O) by X-ray
基金
Project supported by Grant R850009 from Academia Sinica