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  Scopus ID: 21100926589

Synthesis, Characterization and Structural Study of the Novel Phosphate Ag0.4Zn2.8Fe4(PO4)6

Khalil Ahraifou, Jamal Khmiyas, Mohammed Hadouchi, Abderrazzak Assani, Mohamed Saadi and Lahcen El Ammari

Abstract

Ag0.4Zn2.8Fe4(PO4)6 was prepared by classical solid-state method and investigated by means of single-crystal X-ray diffraction (XRD). The purity of the sample was checked by energy dispersive X-ray spectroscopy (EDS). This new phase adopts the typical Howardevansite structure with the triclinic system, space group P-1 and unit cell parameters: a = 6.3551(1), b = 7.9271(1), c = 9.3232(2) Å, α = 105.022(1)°, β =108.085(1)°, and γ = 101.470(1)°. All atoms of the crystal structure occupy the general position 2i except Ag(1)+ and Zn(1)2+ cations which are on two centers of inversion at 1g(-1) and 1h(-1), respectively. This crystal net-framework is made up of folded chains of polyhedral with shared edges based on [Fe(1)2O10] and [Fe(2)2O10] dimers intercalated by Zn(2)O5 unit. Adjacent chains are interconnected by a regular PO43- tetrahedra and ordered in stacked layers perpendicular to [010]. Such an arrangement gives rise to tunnels parallel to [100], that host Ag(1)+ and Zn(1)2+ cations. The stability and accuracy of the suggested structural model have been approved by combinatorial investigations of charge distribution (CD) and bond valence sum (BVS).

Published on: September 29, 2023
doi: 10.17756/nwj.2023-s2-063
Citation: Ahraifou K, Khmiyas J, Hadouchi M, Assani A, Saadi M, et al. 2023. Synthesis, Characterization and Structural Study of the Novel Phosphate Ag0.4Zn2.8Fe4(PO4)6.NanoWorld J 9(S2): S372-S377.

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