AM_Yegorovite Formula: Na4 Si4 O19 H18 Name: Yegorovite Unit cell: 9.8744 12.3981 14.8973 90.0 104.675 90.0 , V=1764.29 Space group: P121/C1 (14)

Zubkova N V , Pekov I V , Pushcharovskii D Y , Kazantsev S S , Doklady Earth Sciences , 427 (2009) p.814-818, Crystal structure of yegorovite Na4[Si4O8(OH)4]*7H2O, Locality: Lovozero alkaline complex, Kola Peninsula, Russia