Anionische Fragmente aus h‐BN in der Struktur La6B4N10

Anionic Fragments of h‐BN in the Structure La₆B₄N₁₀ The compound La₆B₄N₁₀ was synthesized by solid state reactions at high temperatures. Crystals obtained for La₆B₄N₁₀ were systematically twinned and showed orthorhombic symmetry. An X‐ray crystal structure refinement on a needle shaped pseudo‐merohedral twin yielded the monoclinic space group P2₁/c, Z = 2, lattice parameters a = 971.89(6) pm, b = 1479.41(9) pm, c = 762.32(4) pm, β = 90.005(9)° and converged at R1 = 0.0352, wR2 = 0.0555 for all independent reflections. The structure of La₆(B₃N₆)(BN₃)N contains cyclic B₃N₆ ions with three exocyclic N atoms, carbonate ion like BN₃ units and nitride ions that can be considered as fragments or products of a nitration reaction of hexagonal boron nitride.