AM_Manganogrunerite_9
Formula: Mn1.9 Fe3.937 Mg1.251 Ca.1 Si7.812 H2 O24
Name: Manganogrunerite
Unit cell: 9.6817 18.3862 5.34561 90.0 101.8999 90.0 , V=931.12
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 II, T = 550 C, Locality: Langban, Sweden