AM_Plombierite
Formula: Ca2.5 Si3 O12.5 H11
Name: Plombierite
Unit cell: 6.735 7.425 27.987 90.0 90.0 123.25 , V=1170.43
Space group: B11B (9)

Bonaccorsi E , Merlino S , Journal of the American Ceramic Society , 88 (2005) p.505-512, The crystal of tobermorite 14 A (plombierite) a CSH phase, Locality: Ballycraigy, Northern Ireland