title: Li(0.8)Mg(2.1)B2O5F: the first borate fluoride with magnesium-oxygen-fluorine octahedral chains.
abstract: The first alkali metal and magnesium mixed borate fluoride, Li(0.8)Mg(2.1)B2O5F, was prepared by the high-temperature solution method. It crystallizes in the monoclinic space group P2(1)/n (no. 14) with lattice constants a = 3.0881(4) Å, b = 13.6020(2) Å, c = 9.6563(1) Å, β = 91.744(9)°, Z = 4. In the structure, a special magnesium-oxygen-fluorine octahedral chain is found in borates for the first time. The octahedral chains are linked into a three-dimensional framework containing tunnels with (1)(∞)[LiO4](7-) chains and isolated B2O5 groups filling in. The differences of octahedral chains in Li(0.8)Mg(2.1)B2O5F and magnesium inosilicate minerals are discussed. The TG-DSC curves, IR spectrum and UV-Vis-NIR diffuse reflectance spectrum were measured.
authors: Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, 40-1 South Beijing Road, Urumqi 830011, China. zhangmin@ms.xjb.ac.cn slpan@ms.xjb.ac.cn.
authors: Zheng
authors: Z
authors: Wang
authors: Min
authors: M
authors: Zhang
authors: Shilie
authors: S
authors: Pan
authors: Ying
authors: Y
authors: Wang
authors: Hui
authors: H
authors: Zhang
authors: Zhaohui
authors: Z
authors: Chen