CaO - 14,64 %     Na₂O - 10,2 5%     SrO - 0,21
B₂O₃ - 52,19 %     Al₂O₃ - 0,26 %     H₂O - 21,66 %

Optical data: (+); n_x=1,532(2); n_y=1,544(2); n_z=1,561(2); 2V_z=82(1)°, Y=b, Zλc=14°

Crystallographic data: P2₁/c; a=6,506(1) Å, b=13,280(3) Å, c=11,462(3) Å; β=92,97(2)°, Z=4

Tuzlaite was named after its type locality, the Tuzla salt mine in the southwestern foothills of Mount Majevica in Bosnia and Herzegovina.


BERMANEC, V., ARMBRUSTER, T. TIBLJAŠ, D., STURMAN, B.D., KNIEWALD, G. (1994): Tuzlaite, NaCa[B₅O₈(OH)₂] x 3H₂O, a new mineral with a pentaborate sheet structure from the Tuzla salt mine, Bosnia and Hercegovina.- American Mineralogist, 79 (5-6), 562-569.