Ilirneyite is a rare tellurite mineral with the formula Mg<sub>0.5</sub>[ZnMn<sup>3+</sup>(TeO<sub>3</sub>)<sub>3</sub>]â¢4.5H<sub>2</sub>O. It was discovered at the Sentyabr'skoe deposit (of silver and gold) in the Ilirney Range, Western Chukotka, Russia.
Ilirneyite is a trivalent-manganese-analogue of zemannite. It is also a zinc- and manganese-analogue of keystoneite and kinichilite.