AM_Surkhobite Formula: Ba1.275 K.65 Na1.15 Ca.8 Sr.05 Fe3.91 Mn4.09 Ti3.585 Nb.285 Zr.05 Si8 O35.255 F2.745 H2 Name: Surkhobite Unit cell: 10.723 13.826 20.791 90.0 95.0 90.0 , V=3070.67 Space group: C121 (5)

Rastsvetaeva R K , Eskova E M , Dusmatov V D , Chukanov N V , Schneider F , European Journal of Mineralogy , 20 (2008) p.289-295, Surkhobite: revalidation and redefinition with the new formula,, (Ba,K)2CaNa(Mn,Fe2+,Fe3+)8Ti4(Si2O7)4O4(F,OH,O)6, Locality: massif Darai-Pioz, Tajikistan