P3O7 is not a familiar chemical formula or compound in chemistry. It seems to be an incorrect or non-standard notation. If you have any specific context or details, please provide more information for better assistance.
P3O7
The chemical compound P3O7 is called triphosphorus heptoxide. It consists of three phosphorus atoms and seven oxygen atoms. This compound is often encountered in chemical contexts related to phosphorus oxides and their derivatives.