How is Potassium oxido(dioxo)niobium (CAS: 12030-85-2) typically synthesized?

Potassium oxido(dioxo)niobium can be synthesized by treating niobium(III) oxide with potassium hydroxide in a controlled environment. This process involves the use of catalysts and requires careful control of temperature and pressure to achieve high yield and selectivity. The reaction typically takes place in an aqueous solution, and the product is then isolated and purified using standard techniques such as filtration and recrystallization.