AM_Manganogrunerite_4
Formula: Mn1.9 Fe3.939 Mg1.249 Ca.1 Si7.812 H2 O24
Name: Manganogrunerite
Unit cell: 9.66448 18.3592 5.34435 90.0 102.0158 90.0 , V=927.48
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 = 350 C, Locality: Langban, Sweden