Abstract : a method for preparation of rare earth oxides with high specific surface area was described . hydrazine - containing rare earth oxalates as the precursors were synthesized by using rare earth oxalates and hydrazine . the specific surface area of rare earth oxides made by the method described in this paper is higher than that by the usual method 文摘:利用肼(或肼盐)易分解同时释放大量的热和气体这一特点，将肼(或肼盐)添加到草酸稀土中去，热分解含肼稀土草酸盐可制得比表面积较常法制备的大得多的稀土氧化物。
The short - chain carboxylates and inorganic composition of leachates from the fluid inclusions in some quartz vein - type gold deposits in the southeastern guizhou province were determined by ion - chromatogrphy . there are some formate , acetate and oxalate in leachates in small amounts , and the content of formate is greater than that of acetate 用离子色谱法测定了黔东南某些石英脉型金矿床的石英流体包裹体浸取液中的短链羧酸和无机组分，发现其中含有甲酸盐乙酸盐和少量草酸盐，且
