AM_Phase-A_1 Formula: Mg7 Si2 O14 H6 Name: Phase-A Unit cell: 7.8563 7.8563 9.5642 90.0 90.0 120.0 , V=511.23 Space group: P63 (173)

Kagi H , Parise J B , Cho H , Rossman G R , Loveday J S , Physics and Chemistry of Minerals , 27 (2000) p.225-233, Hydrogen bonding interactions in phase A [Mg7Si2O8(OH)6], at ambient and high pressure, Sample: P = 0 GPa