During the thermal decomposition of Ca[MnO4]2·4 H2O, the compound expels up to two water molecules of hydration, before the crystal structure collapses after the loss of the third H2O molecule at 157°C. The crystal structure of Sr[MnO4]2·3 H2O breaks down after the expulsion of the ...
应科学划分机关内部各 部门的职责范围与工作 任务，杜绝办文过程中 的推诿现象