Synthesis and Crystal Structure of a New Lithium Nickel Fluorophosphate Li2[NiF(PO4)] with an Ordered Mixed Anionic Framework

✍ Scribed by M. Dutreilh; C. Chevalier; M. El-Ghozzi; D. Avignant; J.M. Montel

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 185 KB
• Volume: 142
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1998.7908

✦ Synopsis

A new lithium nickel fluorophosphate Li 2 [NiF(PO 4 )] has been synthesized. It crystallizes in the orthorhombic system with unitcell parameters a ‫؍‬ 10.473(3) A s , b ‫؍‬ 6.2887(8) A s , c ‫؍‬ 10.846(1) A s , and space group Pnma (no. 62), Z ‫؍‬ 8. Its structure has been determined from single-crystal X-ray diffraction data and refined to a conventional R ‫؍‬ 0.030 (R ‫؍‬ 0.033) for 647 reflections with I'3 (I). The structure is built of infinite chains of a rutile type of NiO 4 F 2 octahedra running along the b direction further joined together by isolated PO 4 tetrahedra by sharing corners. This three-dimensional framework delimits channels parallel to the b direction where the Li ؉ ions lie. This compound is characterized by a rigorous O-F ordering.