Na2.09 Ca1.178 Mn.032 Mg.92 Fe4.07 (Si6.2 Al1.8 O20.7) (O H)3.3

Al_1.8Ca_1.178Fe_4.07H_3.3Mg_0.92Mn_0.032Na_2.09O₂₄Si_6.2

Hawthorne, F.C.Grungy, H.D.

Canadian Mineralogist (1978) 16, 53-62

a=9.923Å   b=18.134Å   c=5.352Å

α=90°   β=104.84°   γ=90°