Structural Investigations of Two New Ternary Magnesium—Niobium Hydrides, Mg6.5NbH≈14 and MgNb2H≈4.

Crystal Structure Refinement of MgNb2O6C

Crystal Structure Refinement of MgNb2O6Columbite from Neutron Powder Diffraction Data and Study of the Ternary System MgO–Nb2O5–NbO, with Evidence of Formation of New Reduced Pseudobrookite Mg5−xNb4+xO15−δ(1.14≤x≤1.60) Phases

✍ S. Pagola; R.E. Carbonio; J.A. Alonso; M.T. Fernández-Dı́az 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 465 KB

The crystal structure of the columbite-type phase MgNb 2 O 6 has been refined from powder neutron diffraction data. The compound is orthorhombic, space group Pbcn (60), Z ‫؍‬ 4, with unit cell parameters a ‫؍‬ 14.1875(1), b ‫؍‬ 5.7001(1), c ‫؍‬ 5.0331(1) A > . The structure contains chains of NbO 6