The pure sample with spinel structure can be easily prepared by optimizing the processing parameters . the typical product is limnio4 with the cell constant a = 8 . 235 and the powder size belongs to nanometer and sub - micrometer 表明用改进的柠檬酸配合法可以合成出单相正尖晶石limn _ 2o _ 4 ,其典型的试样组成为limn _ 2o _ 4 ,晶格常数= 8 . 235 ,粒度大小为纳米级。