Gaseous ammonia passed over the oxide reduces it to the sesquioxide with formation of nitrogen and water.
The sesquioxide is capable of acting both as an acid and a base.
The rare metal iridium affords a blue which is a mixture of the oxide and the sesquioxide.
The superb green pigment used by enamellers under this name is the green oxide or sesquioxide of chromium.
It differs from the other animal principles in containing, as an essential ingredient, the sesquioxide of iron.
They consist usually of carbonate of lime or magnesia or sesquioxide of iron.
The chief oxides of uranium are the protoxide and the sesquioxide, or uranic oxide.
This substance is almost unknown in a pure state, from its extreme proneness to absorb oxygen and pass into the sesquioxide.
When heated in the oxidation flame, it is converted into the sesquioxide, and then is changed into light brick-red color.
This article, so extensively used in dyeing, is a crude mixed acetate of the protoxide and sesquioxide of iron.