K2O crystallizes in the inverse fluorite structure. In this motif, the positions of the anions and cations are reversed relative to their positions in CaF2, with potassium ions coordinated to 4 oxygen ions, and oxygen ions to 8 potassium ions. [6][7] K2O is an alkaline oxide that reacts violently with water to form caustic potassium hydroxide. It is deliquescent and absorbs moisture from the atmosphere, triggering this violent reaction.
The chemical formula K2O (or "K" for short) is used in a variety of industrial settings: N-P-K values for fertilizers, cement formulations, and glassmaking formulations. Potassium oxide is not usually used directly in these products, but for any type of potash used (such as potassium carbonate), the potassium content is reported in K2O equivalent. For example, potassium oxide is about 83 percent potassium by weight, while potassium chloride is only 52 percent. Potassium chloride provides less potassium than an equivalent amount of potassium oxide. Therefore, if the weight percentage of potassium chloride in a fertilizer is 30%, its standard potassium content based on potassium oxide is only 18.8%.
Potassium oxide is a metal oxide with the molecular formula K2O. It is a potassium salt and metal oxide.
Potassium oxide is an ionic compound formed by combining potassium and oxygen. It has the chemical formula K2O. Can't find free potassium because it's too reactive. It has a valence of +1 and readily combines with an oxygen atom to form K2O. When potassium is oxidized, the oxide K2O is obtained as a gray crystalline substance; potassium burns in excess oxygen to form potassium oxide. Potassium oxide is a strongly corrosive base when dissolved in water.
Potassium oxide, the name on fertilizer labels, indicates the percentage of available potassium reported as K2O. See also potash.
