New compounds of the k2nif4 type
Web1 feb. 2003 · Dalton transactions 2012 The n = 1 Ruddlesden-Popper (RP) phases LaSrM (0.5)Ru (0.5)O (4±δ) (M = Co, Ni and Zn) have been prepared by solid state reactions … Web1 mei 2024 · It is also assumed that the dielectric loss angle tangent (tg d) in the oxides with the K2NiF4 type structure decreases upon a replacement of the lanthanides with …
New compounds of the k2nif4 type
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WebIn this paper the synthesis and structural characterisation of two new K2NiF4-type phases, Ba2In0.5Sb0.5O4 and Sr2In0.5Sb0.5O4, are reported. These are the first examples of … Web1 feb. 2003 · From Rietveld refinements, we found that the compounds have a K2NiF4-type structure with the symmetry of space group I4/mmm. It was found that in these …
WebK₂NiF₄ is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. K¹⁺ is bonded in a 9-coordinate geometry to nine F¹⁻ atoms. There are a spread of K–F bond distances ranging from 2.61–2.83 Å. Ni²⁺ is bonded to six F¹⁻ atoms to form corner-sharing NiF₆ octahedra. The corner-sharing octahedra are not tilted. All Ni–F bond lengths are … WebHowever, at 110 kb, it was found to have transformed completely into a new phase possessing the K2NiF4 structure [8], with unit cell dimensions a := 3.70 :~- 0.01 A, c = 11.88 ± 0'.02 A. Cd2Gu4D4: At 35 kb, 1000°C, Cd2GeO4 trans- formed to another structure chazaeterized by a com- plex X-ray diffraction pattern.
WebTo date, A2BX4 compounds possessing the K2NiF4-type structure are in all cases less dense than their corresponding mixtures of ABX3 and AX compounds possessing, respec- tively, the perovskite (or related ... new polymorph of CazSiO4 synthesized in this work; layers of CaSiO3 (perov- skite) alternate with layers of CaO (lime ... WebHowever, as described earlier, most K2NiF4-type compounds have a larger A cation where the tolerance factor lies between 0.90 and 1.02. In the Cs2CaF4 compound, this …
WebOxygen defect K2NiF4-type oxides La2−xSrxCuO4−x2+δ have been synthesized for a wide composition range: 0 ≤ x ≤ 1.34. From the X-ray and electron diffraction study three domains have been characterized: orthorhombic compounds with La2CuO4 structure for 0 ≤ x < 0.10, tetragonal oxides similar to LaSrCuO4 for 0.10 ≤ x < 1 and several superstructures …
unfit for habitationWeb26 aug. 2010 · K 2 NiF 4 type compounds Sm 2-x Sr x CuO 4 (0 ≤ x ≤ 1.2) were prepared. Rietveld refinement of powder diffraction data snows that the crystal system of these … unfit for the kingdomWebHowever, as described earlier, most K2NiF4-type compounds have a larger A cation where the tolerance factor lies between 0.90 and 1.02. In the Cs2CaF4 compound, this anomaly can be explained by the ... New ternary fluoride with K 2 NiF 4-type structure in CsF-CaF 2 system: Cs 2 CaF 4: unfit for office movieWebThe coupled neutron diffraction and Mossbaüer study of the layered oxide Sr3NdFe3O9 shows for the first time the possibility of anionic vacancies ordering in an oxygen-deficient related Ruddlesden−Popper- (RP-) type ferrite leading to an original intergrowth of brownmillerite and K2NiF4-type layers. The antiferromagnetic properties of this phase … unfit for human habitation ukWeb26 aug. 2010 · K 2 NiF 4 type compounds Sm 2-x Sr x CuO 4 (0 ≤ x ≤ 1.2) were prepared. Rietveld refinement of powder diffraction data snows that the crystal system of these compounds belongs to T type tetragonal structure of space group I4/mmm, and the addition of Sr causes a dramatic shift of the O(I) ions along the c axis from Sm (Sr) … unfit for swineWeb5 jan. 2016 · The powders of perovskite oxide LSCF and K 2 NiF 4 -type oxide LSC 214 were successfully prepared by the sol–gel method. Asymmetric gas-tight LSCF hollow fiber membranes were fabricated through the phase inversion-sintering process. Surface treatment was conducted to improve the surface exchange reaction kinetics of oxygen … unfit for the bench aileen cannonWebNew compounds of the K 2 NIF 4 type. S. N. Ruddlesden and P. Popper. Read article Similar articles. This is the first page of the article you requested. Follow IUCr Journals: E … unfit for society