AM_Manganogrunerite_7
Formula: Mn1.898 Fe3.938 Mg1.252 Ca.1 Si7.812 H2 O24
Name: Manganogrunerite
Unit cell: 9.6802 18.3852 5.34547 90.0 101.9161 90.0 , V=930.85
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 = 500 C, Locality: Langban, Sweden