Citation: Vereshchagin, O. S.; Rozhdestvenskaya, I. V.; Frank-Kamenetskaya O V; Zolotarev, A. A. (2014). Ion substitutions and structural adjustment in Cr-bearing tourmalines Note: Sample 3. European Journal of Mineralogy, 26, pp. 309-321.
Formula: Al5.85 B3 Ca0.13 Cr0.81 Fe0.09 H3.4 Mg2.25 Na0.63 O31 Si6
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al27 B9 Cr27 Fe27 Mg27 O105 Si18 (Al9 B3 Cr9 Fe9 Mg9 O35 Si6)
Multiplicity: 1