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Title Locale Year est. Year ceased Notes Alexandria Expositor and the Columbian Advertiser: Alexandria, District of Columbia: 1802 1805 OCLC 12656722, ISSN 2574-9765 ...
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Cerium(IV) oxide occurs naturally as the mineral cerianite-(Ce). [16] [17] It is a rare example of tetravalent cerium mineral, the other examples being stetindite-(Ce) and dyrnaesite-(La). The "-(Ce)" suffix is known as Levinson modifier and is used to show which element dominates in a particular site in the structure. [18]
Article 4.13: Certificate of Origin [5] A claim that goods are eligible for preferential tariff treatment under this Agreement shall be supported by a Certificate of Origin issued by the exporting Party in the form as prescribed in Section A of Annex 4.13 (Form of Certificate of Origin of Chile, issued by its competent authority) or Section B ...
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These applications exploit the facility of the Ce(III)/Ce(IV) redox couple. [2] It is used in catalytic converters ("three-way catalytic converter") for the minimisation of CO emissions in the exhaust gases from motor vehicles. When there is a shortage of oxygen, cerium(IV) oxide is oxidizes carbon monoxide to the benign dioxide: [3] [4]
Cerium nitrates also form 4:3 and 1:1 complexes with 18-crown-6 (the ratio referring to that between cerium and the crown ether). Classically CAN is a primary standard for quantitative analysis. [ 8 ] [ 9 ] Cerium(IV) salts, especially cerium(IV) sulfate , are often used as standard reagents for volumetric analysis in cerimetric titrations .
Crystal structure of Ceria-zirconia. Ce 4+ has the same charge and similar ionic radius as Ze 4+ resulting in elemental substitution and therefore a positive cerium anomaly. [1] Zircon (ZrSiO 4) is commonly found in felsic igneous rock. [3] Because both Ce 3+ and Ce 4+ can substitute for zirconium, Zircon often has a positive Ce anomaly. [3]