Synthesis and characterization of AgFeO₂ delafossite with non-stoichiometric silver concentration

Abstract

Abstract. The simple co-precipitation method was used to prepare Ag x FeO 2 delafossite with non-stoichiometric silver concentration in the range of x = 0.05-1. The obtained material was investigated using X-ray powder diffraction and 57Fe Mössbauer spectroscopy at room temperature. The structural and hyperfi ne interaction parameters were recognized in relation with decreasing silver concentration. The study revealed that the delafossite structure of Ag x FeO 2 was maintained up to x = 0.9; as the range of silver concentration was decreased to 0.05  x  0.8, a mixture of AgFeO 2 , Fe 2 O 3 or/and FeOOH was formed.

The effect of phase transition of crednerite/delafossite CuMn1−xCrxO2 on optical, thermal, and power factor properties

“…The A 1+ cations are transition-metal ions of a monovalent state consisting of Cu, Ag, Pd, or Pt. [1][2][3]5 The B 3+ cations consist of a group of trivalent transition metals such as Fe 3+ , Cr 3+ , or Mn 3+ . There are many compounds, chemical formula A 1+ B 2+ O 2 , in delafossite groups, for example, CuFeO 2 6 , CuCrO 2 7 , CuCoO 2 8 , and CuMnO 2 9 .…”