Formula
(repeating unit) see text Space group R3m | Crystal system Trigonal | |
Category Silicate mineral, Cyclosilicate Crystal class Ditrigonal pyramidal (3m)
H-M symbol: (3m) Unit cell a = 14.1695, c = 31.026 [Å] | ||
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.
References
Ilyukhinite Wikipedia(Text) CC BY-SA