AM_Metahewettite
Formula: V3 Na O8
Name: Metahewettite
Unit cell: 12.28 3.6 8.0 90.0 96.25 90.0 , V=351.56
Space group: P121/M1 (11)

Bachmann H G , Barnes W H , The Canadian Mineralogist , 7 (1962) p.219-235, The crystal structure of a sodium-calcium variety of metahewettite, Sample: anhydrous