A. Utzolino et K. Bluhm, SYNTHESIS AND CRYSTAL-STRUCTURE OF BA2MN( B3O6)(2) AND BA2CO(B3O6)(2), Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 51(7), 1996, pp. 907-911
Single crystals of Ba2Mn(B3O6)(2) (I) and Ba2Co(B3O6)(2) (II) were pre
pared by using a B2O3 Bur technique, Ba2Mn(B3O6)(2) in an argron atmos
phere. X-ray investigations on single crystals of both compounds yield
the space group <C-3i(2)-R(3)over bar> (No.148) with 3 formula units
in the cell of dimensions (I) a = 711.01 (4), c = 1694.90 (3) pm and (
II) a = 707.2 (2), c = 1673.8(1) pm. The crystal structure is built by
nearly planar (B3O6)(3-) rings and contains one nine-fold coordinated
Barium site. Mn(I) and Co(II) are octahedrally coordinated by oxygen.
The compounds are isotypic to Ba2Ca(B3O6)(2).