K4 (H2 I2 O10) (H2 O)8

H₁₈I₂K₄O₁₈

Mikhail, I.

Materials Research Bulletin (1977) 12, 489-496

a=7.161Å   b=10.553Å   c=7.081Å

α=98.02°   β=117.13°   γ=90.1°