Ilyukhinite

Ilyukhinite is a very rare mineral of the eudialyte group, with formula (H3O,Na)14Ca6Mn2Zr3Si26O72(OH)2*3H2O. The formula given is simplified and does not show the presence of cyclic silicate groups. Ilyukhinite is the second group representative with species-defining hydronium ion after aqualite.