Synthesis and Structure Determination of the Quaternary Zinc Nitride Halides Zn2NX1−yX′y (X, X′ = Cl, Br, I; 0 < y < 1)

Abstract

Abstract:The quaternary series Zn 2 NCl 1−y Br y and Zn 2 NBr 1−y I y were synthesized from solid-liquid reactions between zinc nitride and the respective zinc halides in closed ampoules, and the evolution of their crystal structures was investigated by single-crystal and powder X-ray diffraction. Zn 2 NX 1−y X y (X, X = Cl, Br, I) adopts the anti-β-NaFeO 2 motif in which each nitride ion is tetrahedrally coordinated by four zinc cations, and the halide anions are located in the voids of the skeleton formed by corner-sharing [NZn 4 ] tetrahedra. While Zn 2 NCl 1−y Br y crystallizes in the acentric orthorhombic space group Pna2 1 (No. 33), isotypic to Zn 2 NX (X = Cl, Br), the structure of Zn 2 NBr 1−y I y is a function of the iodide concentration, namely, Zn 2 NBr (Pna2 1 ) for low iodine content and Zn 2 NI (Pnma) for higher (y ≥ 0.38).

Microstructure Evolution and Mechanical Properties of Mg-Gd-Y-Zn-Zr Alloy during Compression

“…It can be considered that the long-period stacking order (LPSO) in these alloys has made a great contribution to the excellent combination of relative strength and ductility. [8][9][10]. The LPSO phase strengthens the Mg matrix due to its higher hardness and elastic modulus.…”

Kinetic Determination of Lanthanum(III) by the Catalytic Effect on the Oxidation of Fluorescent Safranine Dyes with Potassium Bromate

“…Therefore, the determination of lanthanum holds great significance. So far, the method for the determination of lanthanum has been applied spectrophotometry, [1][2][3] fluorescence spectrometry, 4,5 mass spectrometry (ICP-MS), 6 reverse-phase flow injection chemiluminescence, 7 and inductively coupled plasma atomic emission spectrometry. 8 However, to determination of lanthanum with catalytic kinetic fluorescence has only a few reports.…”