AM_Metahewettite_1
Formula: V3 Na.5 Ca.25 O9 H2
Name: Metahewettite
Unit cell: 12.26 3.58 8.11 90.0 92.5 90.0 , V=355.62
Space group: P1211 (4)

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: hydrated