Citation: Bosi, F.; Reznitskii, L.; Skogby, H. (2012). Oxy-chromium-dravite, NaCr3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup. American Mineralogist, 97, pp. 2024-2030.
Formula: Al0.798 B3 Cr5.322 F0.46 H2.67 Mg2.073 Na O30.54 Si5.898 Ti0.039 V0.87
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al36 B9 Cr27 F3 H9 Mg27 O93 Si18 Ti9 V9 (Al12 B3 Cr9 F H3 Mg9 O31 Si6 Ti3 V3)
Multiplicity: 1