AM_Tiptopite Formula: P3 Be3 O15.01 K Li1.44 Na.84 Ca.36 H3.01 Name: Tiptopite Unit cell: 11.655 11.655 4.692 90.0 90.0 120.0 , V=551.97 Space group: P63 (173)

Peacor D R , Rouse R C , Ahn J-H , American Mineralogist , 72 (1987) p.816-820, Crystal structure of tiptopite, a framework beryllophosphate isotypic with basic, cancrinite, Note: U(1,2) for OH5 has been altered to match symmetry constraints.