AM_Al3Si2O7(OH)3
Formula: Al3 Si2 O10 H3
Name: Al3Si2O7(OH)3
Unit cell: 6.0885 7.2832 7.7234 115.71 88.85 92.89 , V=308.19
Space group: P1 (1)

Daniels P , Wunder B , European Journal of Mineralogy , 8 (1996) p.1283-1292, Al3Si2O7(OH)3, phase Pi (formerly piezotite): Crystal structure, of a synthetic high-pressure silicate rediscovered