AM_Ingersonite
Formula: Ca3 Mn Sb3.983 Mg.017 O14
Name: Ingersonite
Unit cell: 7.282 7.282 17.604 90.0 90.0 120.0 , V=808.43
Space group: P3121 (152)

Bonazzi P , Bindi L , American Mineralogist , 92 (2007) p.947-953, The crystal structure of ingersonite, Ca3Mn2+Sb5+4O14, and its relationships with, pyrochlore, Locality: Langban mine, Varmland, Sweden