1.018 : 1.000
At the time when it was used in these experiments, the ratio of manganese to available oxygen was found to be
1.198 : 1.000
Corresponding very nearly to the ratio of manganese to available oxygen in MnO·5MnO₂.
Experiment I.
230 m.g. of the oxide was treated with the quantity of permanganate calculated to be necessary for its oxidation to manganese dioxide. The mixture was kept at a temperature of 22°C. until the color of the permanganate disappeared. This required about ten hours.
An analysis of the oxide then gave a ratio of manganese to available oxygen
1.027 : 1.000
Experiment II