Identification of a new strontium Ni(III) oxide prepared in molten hydroxides

• Published in: Journal of solid state chemistry Vol. 93; no. 1; pp. 267 - 271
• Main Authors: Lee, Jeonghee, Holland, Gary F.
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 01.07.1991; Elsevier
• Subjects: 360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies; ALKALI METAL COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; ATMOSPHERIC PRESSURE; CHALCOGENIDES; CHEMICAL ANALYSIS; CHEMICAL PREPARATION; Chemistry; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIFFRACTION; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELECTRON MICROPROBE ANALYSIS; ELEMENTS; Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...); Exact sciences and technology; GRAVIMETRIC ANALYSIS; HEXAGONAL LATTICES; HYDROGEN COMPOUNDS; HYDROXIDES; Inorganic chemistry and origins of life; MAGNETIC PROPERTIES; MAGNETIC SUSCEPTIBILITY; MAGNETIZATION; MATERIALS; MATERIALS SCIENCE; METALS; MICROANALYSIS; MOLTEN SALTS; NICKEL; NICKEL COMPOUNDS; NICKEL OXIDES; NONDESTRUCTIVE ANALYSIS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; POTASSIUM COMPOUNDS; POTASSIUM HYDROXIDES; POWDERS; Preparations and properties; QUANTITATIVE CHEMICAL ANALYSIS; SALTS; SCATTERING; SEMICONDUCTOR MATERIALS; STRONTIUM COMPOUNDS; STRONTIUM OXIDES; SYNTHESIS; TEMPERATURE RANGE; TEMPERATURE RANGE 0400-1000 K; THERMAL ANALYSIS; THERMAL GRAVIMETRIC ANALYSIS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; VALENCE; X-RAY DIFFRACTION; Nickel III Strontium Oxides Mixed; Trivalent metal Compounds; Transition metal Compounds; Preparation; X ray diffraction; Physical properties; Alkaline earth metal Compounds; Magnetic susceptibility
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/0022-4596(91)90299-W

The compound Sr 5Ni 4O 11 was prepared at atmospheric pressure from potassium hydroxide melts, by slow cooling from 700°C. All observed lines in the powder X-ray diffraction pattern were indexed according to a hexagonal unit cell, with a = 9.480(1)Å, c = 7.815(4)Å. The idealized formula Sr 5Ni 4O 11 corresponds to a formal oxidation state of Ni +3. From magnetic susceptibility measurements, the observed high temperature Curie constant is consistent with the low spin t 6 2 g e 1 g configuration. Electrical conductivity measurements exhibit linear behavior of ln ϱ vs 1/ T over the range 270–350 K, indicating semiconducting behavior with a bandgap of 0.5 ± 0.1 eV and room temperature resistivity ∼10 5 Ω-cm.