AM_Fukalite Formula: Ca4 Si2 C O11 H4 Name: Fukalite Unit cell: 7.573 23.364 11.544 90.0 109.15 90.0 , V=1929.52 Space group: P121/C1 (14)

Merlino S , Bonaccorsi E , Grabezhev A I , Zadov A E , Pertsev N N , Chukanov N V , American Mineralogist , 94 (2009) p.323-333, Fukalite: An example of an OD structure with two-dimensional disorder, Locality: Gumeshevsk skarn, Central Urals, Russia