Na15 Y1.44 (Si12 O36)

Na_11.89O₃₆Si₁₂Y_1.44

Beyeler, H.U.Hibma, T.

Solid State Communications (1978) 27, 641-643

a=22Å   b=22Å   c=12.61Å

α=90°   β=90°   γ=120°