(Ca1.85 Na0.14 Pb0.01) (Zn0.85 Al0.07 Mg0.03 Mn0.04 Fe0.02) (Si2 O7)

Al_0.07Ca_1.85Fe_0.02Mg_0.03Mn_0.04Na_0.14O₇Pb_0.01Si₂Zn_0.85

Bindi, L.Roethlisberger, F.Czank, M.Bonazzi, P.

American Mineralogist (2001) 86, 747-751

a=7.8Å   b=7.8Å   c=5Å

α=90°   β=90°   γ=90°