Formula: Na3 Sr K Si8 O23.28 H18
Name: KNa3SrSi8O19*4.3H2O
Unit cell: 6.6599 23.7225 7.0225 90.0 91.81 90.0 , V=1108.93
Space group: P121/M1 (11)

Cadoni M , Ferraris G , European Journal of Mineralogy , 21 (2009) p.485-493, Two new members of the rhodesite mero-plesiotype series, close to delhayelite and hydrodelhayelite:, synthesis and crystal structure, Note: Sample TRO4, Note: cell parameters, occupancy and positional parameters corrected by author