AM_Manganogrunerite_6
Formula: Mn1.901 Fe3.937 Mg1.25 Ca.1 Si7.812 H2 O24
Name: Manganogrunerite
Unit cell: 9.67514 18.375 5.3448 90.0 101.9463 90.0 , V=929.62
Space group: C12/M1 (12)

Reece J J , Redfern S A T , Welch M D , Henderson C M B , McCammon C A , Physics and Chemistry of Minerals , 29 (2002) p.562-570, Temperature-dependent Fe-Mn order-disorder behaviour in amphiboles, Sample: BM40798, T = 450 C, Locality: Langban, Sweden