Citation: Merlino, S.; Perchiazzi, N. (1985). The crystal structure of hiortdahlite I. TMPM. Tschermaks Mineralogische und Petrographische Mitteilungen (1979-), 34, pp. 297-310.
Formula: Ca9.13 F5.2 Fe0.33 Mn0.33 Na3.2 O30.8 Si8 Ti0.33 Zr2.67
Chemical name: (Na3.2 Ca0.8) Ca8 Zr2 (Zr0.67 Ti0.33 Ca0.33 Mn0.33 Fe0.33) (Si2 O7)4 O2.8 F5.2
List type: noninterleaving
List: 2D
Basis: (1;0;0 0;0;1)
Dimensionality: 2
Formula: Ca2 F2 Fe2 Mn2 O32 Si8 Ti2 Zr4 (Ca F Fe Mn O16 Si4 Ti Zr2)
Multiplicity: 1