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Cubic Li3-xMoO4 is obtained by reaction of Li2MoO4 with BuLi in hexane solution (double or triple excess of BuLi). [ABSTRACT FROM AUTHOR]

The new compounds Li3CuB3O7 (I), Li2Cu9B12O28 (II), and Li8Cu7B14O32 (III) as well as a new polymorph of Li6CuB4O10 (IV) are identified by single crystal XRD after annealing of several compositions of the Li2O-CuO-B2O3 system at 1273 K in air. [ABSTRACT FROM AUTHOR]

In the present tetragonal modification of dysprosium orthomolybdate, Dy(2)(MoO(4))(3), the Dy, one Mo and one O atom are located on a mirror plane with Wyckoff symbol 4e, while another Mo atom is located on a fourfold inverse axis, Wyckoff symbol 2a. A single crystal was selected from a polycrystalline mixture of the Dy(2)O(3)-ZrO(2)-MoO(3) system and was stable at room temperature for at least three months. The structure refinement does not indicate the presence of Zr on the Dy sites (to within 1% accuracy). Thus, the stabilization of the tetragonal form is due to disordered positions for a second O atom and split positions for a third O atom that also maintain the DyO(7) coordination, which is not expected for short Dy-O distances [2.243 (6)-2.393 (5) Å].

A new polymorph of nonacopper(II) bis(orthoborate) bis(hexaoxodiborate), Cu(9)(BO(3))(2)(B(2)O(6))(2), or Cu(3)B(2)O(6) with Z' = 3, has a pseudo-layered monoclinic structure containing BO(3) triangles and B(2)O(6) units consisting of corner-sharing BO(3) triangles and BO(4) tetrahedra. The compound was obtained during an investigation of the Li-Cu-B-O system. In contrast to the triclinic form of Cu(3)B(2)O(6), the layers are linked to one another by BO(4) tetrahedra.