AM_Afwillite
Formula:
Ca3 Si2 O10 H6
Name:
Afwillite
Unit cell:
16.27 5.632 13.23 90.0 134.8 90.0 , V=860.21
Space group:
C1C1 (9)
Megaw H D , Acta Crystallographica , 5 (1952) p.477-491, The structure of afwillite, Ca3(SiO3OH)2*2H2O, Locality: Scawt Hill, Northern Ireland