The crystal structure of a new hexagonal phase of AgFeO2

Abstract

A new silver ferrite, &AgFeO2, which is hexagonal with the space group P63/mmc and the lattice dimensions, a= 3"039 and c= 12.395 A, Z--2, was synthesized hydrothermally. The structure has been determined by the heavy-atom method and refined by the block-diagonal least-squares approximation to a final R value of 0.063. The hexagonal cell consists of two double layers of oxygen atoms with two layers of silver atoms interleaved with the double layers. The basal plane containing the silver atom is a mirror plane of the structure. Silver atoms are linearly coordinated by oxygen atoms with Ag

Nanocrystalline Iron Oxides Prepared via Co-Precipitation for Lithium Battery Cathode Applications

“…However, the observed increasing pre-edge intensity in the low silver content AgxFeO2 materials could be attributed to tetrahedral Fe 3+ from the maghemite (γ-Fe2O3) phase, with increasing maghemite and increasing pre-edge peak intensity with decreasing silver (x) content. (12) Thus, the XAS results are consistent with the Raman data.…”

Comparing silver and copper as promoters in Fe-based Fischer–Tropsch catalysts using delafossite as a model compound

“…Delafossite silver ferrite may exist in two distinctly different crystalline phases, viz. rhombohedral 3R-AgFeO 2 (R 3m) and hexagonal 2H-AgFeO 2 (P6 3 /mmc) [36][37][38]40,41]. The broadness of the diffraction peaks obtained with this sample (see Supplementary material) only allowed a semi-quantitative evaluation of the two phases present.…”

Preparation of Trigonal and Hexagonal Cuprous Chromite and Phase Transition Study Based on Single Crystal Structure Data

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