(Na0.78 Ca0.14) (Fe2.3 Mg0.7) (Al5.59 Mg0.41) (Si6 O18) (B O3)3 (O H)4

Al_5.59B₃Ca_0.14Fe_2.3H₄Mg_1.11Na_0.78O₃₁Si₆

Ondrus, P.Vrana, S.Maslan, M.

Bulletin of the Czech Geological Survey (2002) 77, 23-28

a=15.9856Å   b=15.9856Å   c=7.1892Å

α=90°   β=90°   γ=120°