AM_Jahnsite-(CaMnMg)
Formula: Ca Mn Mg2 Fe2 P4 O26 H18
Name: Jahnsite-(CaMnMg)
Unit cell: 14.94 7.14 9.93 90.0 110.16 90.0 , V=994.35
Space group: P12/A1 (13)

Moore P B , Araki T , American Mineralogist , 59 (1974) p.964-973, Jahnsite, CaMnMg2(H2O)8Fe2(OH)2[PO4]4: A novel stereoisomerism of, ligands about octahedral corner-chains, Locality: Tip Top mine, Custer Country, South Dakota, USA