AM_Natrophosphate Formula: Na7 P2 O27 F H28 Name: Natrophosphate Unit cell: 27.755 27.755 27.755 90.0 90.0 90.0 , V=21380.79 Space group: FD3C (228)

Baur W H , Tillmanns E , Acta Crystallographica, Section B , 30 (1974) p.2218-2224, Salt hydrates. X. The crystal structure determinations of heptasodium fluoride, bisphosphate 19-hydrate and heptasodium fluoride bisarsenate 19-hydrate and, the computer simulation of the isomorphous vanadate salt, Note: not all H were located, Locality: synthetic