Formation and properties of copper(II) divanadate(V)

Review—Copper Oxide-Based Ternary and Quaternary Oxides: Where Solid-State Chemistry Meets Photoelectrochemistry

“…These have been observed in recent SCS studies (as yet, unpublished) in our laboratories, and have been studied by thermal analysis and high-temperature XRD by previous authors. 102,103 Three polymorphs are known and their transitions (often reversible) occur at temperatures ranging from ∼ 500 • C to ∼700 • C. Other examples of polymorphism may be found in Table II. The wurtzite-derived β-CuGaO 2 structure has been studied using synchrotron X-ray radiation.…”

Magnetic structure and Dzyaloshinskii-Moriya interaction in theS=12helical-honeycomb antiferromagnetα−Cu2V2Gitgeatpong1, Zhao2, Avdeev3 et al. 2015Phys. Rev. B483210View full textAdd to dashboardCite

“…[14][15][16] The α-phase of Cu 2 V 2 O 7 crystallizes in the orthorhombic system of space group Fdd2 with a = 20.645(2)Å, b = 8.383(7)Å, and c = 6.442(1)Å. 17,18 Structurally, Cu 2+ ions that are surrounded by five oxygen ions appear to form a chain of edge sharing CuO 5 polyhedra while the nonmagnetic V 5+ ions, each of which is surrounded by four oxygen ions to form V 2 O 7 double corner-sharing tetrahedra, are intercalated between the chains as shown in Fig.…”

Thermoelectric Properties and Phase Transition of (Zn<I><SUB>x</SUB></I>Cu<SUB>2&minus;<I>x</I></SUB>)V<SUB>2</SUB>O<SUB>7</SUB>

“…Earlier reports 8,11,[20][21][22] are in good agreement with recently obtained values. 10) Although the precipitation of the second phase such as 14,23) and Cu 3 V 2 O 8 14) was often reported, it has never been found in XRD, SEM and EDX analysis for x > 0:2. The analytical compositions observed by EDX exhibited marginally greater vanadium concentrations than those of the nominal compositions, as shown in Table 1, although the molar ratios of Zn and Cu matched well with the nominal compositions.…”