The project that yielded C-103 began in 1959 with as many as 256 experimental niobium alloys in the "C-series" (possibly from columbium) that could be melted as buttons and rolled into sheet. Sr{sub 4}AlNbO{sub 8} was synthesized at 1500 deg. [33] Niobium is attacked by hydrofluoric acid and hydrofluoric/nitric acid mixtures. 1. endstream
endobj
69 0 obj
991
endobj
70 0 obj
<< /Filter /FlateDecode /Length 69 0 R >>
stream
Nb
G. Svensson, J. K�hler, M. T. Otten, A. Simon. }1|��$1�h�����n0[�����1O��T����0 �Gx
endstream
endobj
71 0 obj
1127
endobj
72 0 obj
<< /Filter /FlateDecode /Length 71 0 R >>
stream
For terms and use, please refer to our Terms and Conditions B. HESSEN, S. A. SUNSHINE, T. SIEGRIST, A. T. FIORY, J. V. WASZCZAK. The Cs{sup +} cations are localized between layers and ensured the cohesion of the structure. [75] Niobium alloy superconductors and electronic components account for a very small share of the world production. Preparation and characterization of the support, Preparation and crystal structure of new potassium niobium oxides: K{sub 2}M{sub 2}Nb{sub 4}O{sub 13} (M = Mg,Fe), Preparation and crystal structure of a new reduced rubidium niobium oxide: [Rb[sub 1. Synthesis and dielectric properties of barium tantalates and niobates with complex perovskite structure. 0000011752 00000 n
[119], Hypoallergenic applications: medicine and jewelry, International Union of Pure and Applied Chemistry, Companhia Brasileira de Metalurgia e Mineração, International Thermonuclear Experimental Reactor, 150 Years Semmering Alpine Railway commemorative coin, European Satellite Navigation commemorative coin, "Atomic weights of the elements 2013 (IUPAC Technical Report)", "An analysis of a mineral substance from North America, containing a metal hitherto unknown", "Outline of the Properties and Habitudes of the Metallic Substance, lately discovered by Charles Hatchett, Esq. photoelectron spectroscopy. Niobium(V) oxide, 99.99%, (trace metal basis) Nb2O5. Your Mendeley pairing has expired. 0000005622 00000 n
The American Chemical Society holds a copyright ownership interest in any copyrightable Supporting Find more information on the Altmetric Attention Score and how the score is calculated. O. G. D’yachenko, S. Ya. It was observed that the turnover number increases with the temperature of the treatment. redistribute this material, requesters must process their own requests via the RightsLink permission [74] The main niobium carbide is NbC, an extremely hard, refractory, ceramic material, commercially used in cutting tool bits. Note:
These detectors were tested at the Submillimeter Telescope, the South Pole Telescope, the Receiver Lab Telescope, and at APEX, and are now used in the HIFI instrument on board the Herschel Space Observatory.[92]. It is frequently used in jewelry and has been tested for use in some medical implants. Anthony J. Cortese, Branford Wilkins, Mark D. Smith, Gregory Morrison, Hans-Conrad zur Loye. Please reconnect. 0000004081 00000 n
Al-Nb oxides were prepared from niobium and aluminum oxalates in aqueous solution and calcined at temperatures ranging from 500 to 820C. Wah Chang fabricated the first 500-lb heat of C-103 in 1961, ingot to sheet, using EBM and VAR. Niobium(V) oxide, 99.99% trace metals basis. [119][120][121] For oral administration the toxicity is lower; a study with rats yielded a LD50 after seven days of 940 mg/kg. The lattice parameters are a = 14.930 (3) {angstrom}, b = 10.824 (3) {angstrom}, c = 5.214 (2) {angstrom}, {beta} = 93.59 (2) {angstrom}, and V = 840.9 (4) {angstrom}{sup 3}. This framework delimits huge tunnels where the cesium cations are located, A new cesium uranyl niobate, Cs{sub 9}[(UO{sub 2}){sub 8}O{sub 4}(NbO{sub 5})(Nb{sub 2}O{sub 8}){sub 2}] or Cs{sub 9}U{sub 8}Nb{sub 5}O{sub 41} has been synthesized by high-temperature solid-state reaction, using a mixture of U{sub 3}O{sub 8}, Cs{sub 2}CO{sub 3} and Nb{sub 2}O{sub 5}. The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online.