AM_Krettnichite Formula: (Pb.83 Sr.17) Mn2 V2 (O10 H2) Name: Krettnichite Unit cell: 9.2953 6.2894 7.6906 90.0 118.068 90.0 , V=396.73 Space group: C12/M1 (12)

Brugger J , Armbruster T , Criddle A J , Berlepsch P , Graeser S , Reeves S , European Journal of Mineralogy , 13 (2001) p.145-158, Description, crystal structure, and paragenesis of krettnichite,, PbMn2(VO4)2(OH)2, the Mn3+ analogue of mounanaite