AM_Wavellite
Formula: Al3 P2 O16 H15
Name: Wavellite
Unit cell: 9.621 17.363 6.994 90.0 90.0 90.0 , V=1168.34
Space group: PCMN (62)

Araki T , Zoltai T , Zeitschrift fur Kristallographie , 127 (1968) p.21-33, The crystal structure of wavellite, Locality: Montgomery County, Arkansas, USA