AM_Holtedahlite_1
Formula: Mg12 P6 O30 H7
Name: Holtedahlite
Unit cell: 11.186 11.186 4.977 90.0 90.0 120.0 , V=539.32
Space group: P31M (157)

Romming C , Raade G , Mineralogy and Petrology , 40 (1989) p.91-100, The crystal structure of natural and synthetic holtedahlite, Locality: synthetic