AM_Lyonsite
Formula: Cu1.59 Fe2 V3 O12
Name: Lyonsite
Unit cell: 10.296 17.207 4.91 90.0 90.0 90.0 , V=869.87
Space group: PMCN (62)

Hughes J M , Starkey S J , Malinconico M L , Malinconico L L , American Mineralogist , 72 (1987) p.1000-1005, Lyonsite, Cu3Fe4(VO4)6, a new fumarolic sublimate from Izalco, volcano, El Salvador: Descriptive mineralogy and crystal structure