Citation: Pertlik, F.; Ertl, A.; Schuster, R.; Brandstaetter, F.; Koerner, W. (2003). Na-rich dravite in the marbles from Friesach, Carinthia, Austria: chemistry and crystal structure. Neues Jahrbuch fuer Mineralogie. Monatshefte (Band=Jahr) (1950-), 2003, pp. 277-288.
Formula: Al6.18 B3 Ca0.18 F0.12 H3.68 Mg2.82 Na0.66 O30.88 Si6
Chemical name: (Na0.66 Ca0.18) (Mg2.46 Al0.54) (Al5.64 Mg0.36) (B O3)3 (Si6 O18) ((O H)3.68 F0.12 O0.2)
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al27 B9 F3 H9 Mg27 O93 Si18 (Al9 B3 F H3 Mg9 O31 Si6)
Multiplicity: 1