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References 1. Amrute, P., Larrazábal, G. O., & Mondelli, C. (2013). CuCrO2 delafossite: A stable copper catalyst for chlorine production. Angew. Chem. Int. Ed., 52, 1-5. DOI: 10.1002/anie.201304254. 2. Durham, J. L., Kirshenbaum, K., Takeuchi, E. S., Marschilok, A. C., & Takeuchi, K. J. (2015). Synthetic control of composition and crystallite size of silver ferrite composites: profound electrochemistry impacts. Chem. Commun., 51, 5120-5123. DOI: 10.1039/c4cc10277k. 3. Elsayed, I. A., Çavas, M., Gupta, R., Fahmy, T., Al-Ghamdi, A. A., & Yakuphanoglu, F. (2015

Abstract

We investigated the substitution effects of Al3+ for Cr3+ on the structure and magnetic, properties of delafossite oxide CuCrO2, which possesses a quasi-2D Heisenberg triangular antiferromagnetic (AFM) lattice. The lattice parameters was found to vary according to the Vegard’s rule. We also found that the large local lattice distortion, caused by the nonmagnetic dopant with different radii between magnetic and nonmagnetic ions, affects the samples significantly. Magnetization and specific heat measurements indicated that AFM ordering is diluted by the substitution of nonmagnetic Al3+ for Cr3+ (S = 3/2).

Synthese und Kristallstruktur eines Oxoantimonats mit Verwandtschaft zum Delafossit-Typ: Cu3MgSbl940 6 Synthesis and Crystal Structure of an Oxoantimonate with Relationship to the Delafossite Type: Cu3MgSbi 40 6 H. Szillat, Hk. Müller-Buschbaum* Institut für Anorganische Chemie der Christian-Albrechts-Universität zu Kiel, Olshausenstraße 40, D-24098 Kiel Z. Naturforsch. 50b, 261-264 (1995); eingegangen am 26. September 1994 Crystal Structure, Copper, Magnesium, Antimony, Oxide Single crystals of Cu3MgSb140 6 have been prepared by crystallization from melts and

-steel autoclaves. AgScO2 was obtained in the 3R Delafossite-type structure, R3̄m, with a = 3.21092(2), c = 18.5398(1) Å and Z = 3, containing virtually no admixtures of the 2H polytype. The fully ordered structure was solved by high-resolution X-ray powder diffraction data, R(F2) = 0.0436, 30 parameters. AgScO2 decomposes at around 740 ◦C into Ag and Sc2O3 with the release of oxygen. The conductivity of AgScO2 in- creases gradually with temperature from 5.79 × 10−18 to 7.94 × 10−10 S cm−1, and is ionic in nature, the activation energy for ion conduction being 75 kJ mol−1 in the

group C2/m with cell parameters a = 557.8(6) pm, b = 288.1(2) pm, c = 588.6(7) pm, ß = 104.00(5)° and Z = 2. The structure can be described as a close packing of linear [O — Cu — O]3- groups parallel to the c-axis where Mnm-ions occupy edge sharing Mn06 octahedra forming layers perpendicular to the c-axis. It is closely related to that of delafossite, CuFe02, but the Jahn-Teller effect of MnIII-ions breaks the three-fold symmetry. 1. Introduction The mineral crednerite was discovered by Credner (1848) in Friedrichroda (Thuringia) and Rammelsberg (1848) attributed the

Supree Pinitsoontorn 6 Thermoelectric oxides Abstract: This chapter presents a comprehensive review of the high-performance p-type thermoelectric (TE) oxide materials. The benefits of using oxides for TE ap- plications include high stability and durability at elevated temperature, abund- ancy, low-cost, and non-toxicity. The research on TE oxides has increased substantially in the last two decades. The most popular candidates for p-type TE oxides include NaxCoO2, Ca3Co4O9, delafossite oxides, and BiCuSeO. They are the main subject of this chapter. There are

lattice parameters o f the com pounds (Delafossite-type), which crystallizes in the space group R 3 m, are: a — 2.985 Ä, c = 18.51 Ä ; c/a = 6.20; number of formula units Z = 3 (dexp = 6.63; dr0 = 6.69 gem -3). For the oxygen particles in the point position 6c z(O) = 0.1119. Bei Versuchen zur Darstellung von TlCr021 durch Tempern äquimolarer Tl20 /Cr203-Gemenge in gas­ dicht verschlossenen Silbertiegeln an der Luft er­ hielten wir unerwartet Einkristalle von AgCr02. Diese Verbindung ist zwar seit längerem bekannt2-4; ihre Kristallstruktur ist bislang aber

the mechanism of delafossite precipitation. Keywords: copper, direct-to-blister smelting, slag, micro- structure, phase equilibria PACS® (2010). 64.75 *Corresponding author: Pekka Taskinen: Aalto University, School of Chemical Technology, MSE/Metallurgical Thermodynamics and Modeling Group, Aalto, Finland. E-mail: pekka.taskinen@aalto.fi Markku Kaskiala, Kaisa Miettinen, Jani Jansson: Aalto University, School of Chemical Technology, MSE/Metallurgical Thermodynamics and Modeling Group, Aalto, Finland 1  Introduction Several authors have investigated freeze

Zeitschrift für Kristallographie 165, 313-314 (1983) c by R. Oldenbourg Verlag, München 1983 Synthesis and crystal structure of 2H—CuA102 Β. U. Köhler and M. Jansen Institut für Anorganische Chemie der Universität, Callinstraße 9, D-3000 Hannover, Federal Republic of Germany Received: August 30, 1983 Synthesis / Crystal structure / 2H — CuA102 Abstract. 2H—CuA102 was obtained by reaction of Cu 2 0 and A1203 in a PbO flux. The crystal structure, which represents a 2H-stacking variant of the delafossite type of structure, was refined using single crystal