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The γ polymorph of cerium(III) sulfide adopts a cation-deficient form of the Th 3 P 4 structure. 8 out the 9 metal positions in the Th 3 P 4 structure are occupied by cerium in γ-Ce 2 S 3, with the remainder as vacancies. This composition can be represented by the formula Ce 2.667 0.333 S 4.
Cerium sulfide forms yellow crystalline solid of cubic syngony crystals, space group Fm3m, cell parameter a = 0.5780 nm, Z = 4, of NaCl-type structure. [citation needed] The compound melts congruently at a temperature of 2450 °C.
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. [10]
Cerium is a chemical element; it has symbol Ce and atomic number 58. It is a soft , ductile , and silvery-white metal that tarnishes when exposed to air. Cerium is the second element in the lanthanide series, and while it often shows the oxidation state of +3 characteristic of the series, it also has a stable +4 state that does not oxidize water.
Cerium(III) chloride – CeCl 3; Cerium(III) fluoride – CeF 3; Cerium(III) hydroxide – Ce(OH) 3; Cerium(III) iodide – CeI 3; Cerium(III) nitrate – Ce(NO 3) 3; Cerium(III) oxide – Ce 2 O 3; Cerium(III) sulfate – Ce 2 (SO 4) 3; Cerium(III) sulfide – Ce 2 S 3; Cerium(IV) hydroxide – Ce(OH) 4; Cerium(IV) nitrate – Ce(NO 3) 4 ...
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Cerium sulfide may refer to: Cerium monosulfide, CeS; Cerium(III) sulfide, Ce 2 S 3 This page was last edited on 21 January 2024, at 18:17 (UTC). Text is ...
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