Treatment of the spinel limn2o4 with aqueous acid produces - mno2 . x - ray diffraction and atomic absorption spectroscopy show that - mno2 with lattice constant of 0 . 806nm preserves the structural framework of the limn2o4 and the conversion of limn2o4 to - mno2 results in some contraction of the lattice 利用limn2o4與稀酸作用制得- mno2 ,經xrd 、原子吸收光譜( aas )分析表明- mno2仍然保持了尖晶石的面心立方點陣,晶胞參數0 . 806nm ; limn2o4經過酸處理、鋰離子脫出后晶胞體積發生了收縮。