AM_Antigorite
Formula: Si34 Mg48 O147 H79
Name: Antigorite
Unit cell: 43.505 9.251 7.263 90.0 91.32 90.0 , V=2922.33
Space group: P1M1 (6)

Capitani G , Mellini M , American Mineralogist , 89 (2004) p.147-158, The modulated crystal structure of antigorite: The m = 17 polysome