oxyiodide
Oxyiodide is a term that has appeared in some chemical literature to describe compounds that combine iodine with oxide in a single species. However, there is no widely accepted definition of oxyiodide as a formal class in modern inorganic nomenclature. In current iodine–oxygen chemistry, the established terms are hypoiodite (IO−), iodite (IO2−), iodate (IO3−), and periodate (IO4−), along with neutral iodine oxides such as I2O5. When encountered, oxyiodide is often used loosely to refer to salts containing iodine–oxygen units, or to iodate/periodate species, but this usage is not standardized.
Examples of well-defined iodine–oxygen compounds include potassium iodate (KIO3), sodium iodate (NaIO3), and sodium periodate (NaIO4).
Because the label "oxyiodide" lacks a single authoritative definition, readers should seek clarification from the source