Preparation and thermochemical properties of BaNiO2+x

Joseph DiCarlo; Iman Yazdi; Allan J. Jacobson; Alexandra Navrotsky

doi:10.1006/jssc.1994.1096

Preparation and thermochemical properties of BaNiO_2+x

Joseph DiCarlo, Iman Yazdi, Allan J. Jacobson, Alexandra Navrotsky

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

Single crystals of BaNiO₃ have been synthesized in molten KOH. The enthalpies of formation from the component oxides at 25°C of BaNiO₂, BANiO_2.63, and BaNiO₃ have been measured using high temperature reaction calorimetry. As the value of x increases in BaNiO_2+x, the enthalpy of formation becomes more exothermic. From the enthalpy of formation data, an enthalpy of oxidation of -196 ± 20 kJ/(mole O₂) was obtained. This value is very similar to the values of -202 ± 18 and -220 ± 50 kJ/(mole O₂) obtained for YBa₂Cu₃O_7-y and La_2-xBa_xCuO_4-y, respectively Z. Zhou, and A. Navrotsky, J. Mater. Res. 7(11), 2920 (1992); J. DiCarlo, J. Bularzik, and A. Navrotsky, J. Solid State Chem. 96, 381 (1992). Energetic and structural data are discussed in terms of a model in which the holes have significant oxygen character [A. Mehta, J. DiCarlo, and A. Navrotsky, J. Solid State Chem. 101, 173 (1992).].

Original language	English (US)
Pages (from-to)	223-226
Number of pages	4
Journal	Journal of Solid State Chemistry
Volume	109
Issue number	2
DOIs	https://doi.org/10.1006/jssc.1994.1096
State	Published - Apr 1994
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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title = "Preparation and thermochemical properties of BaNiO2+x",

abstract = "Single crystals of BaNiO3 have been synthesized in molten KOH. The enthalpies of formation from the component oxides at 25°C of BaNiO2, BANiO2.63, and BaNiO3 have been measured using high temperature reaction calorimetry. As the value of x increases in BaNiO2+x, the enthalpy of formation becomes more exothermic. From the enthalpy of formation data, an enthalpy of oxidation of -196 ± 20 kJ/(mole O2) was obtained. This value is very similar to the values of -202 ± 18 and -220 ± 50 kJ/(mole O2) obtained for YBa2Cu3O7-y and La2-xBaxCuO4-y, respectively Z. Zhou, and A. Navrotsky, J. Mater. Res. 7(11), 2920 (1992); J. DiCarlo, J. Bularzik, and A. Navrotsky, J. Solid State Chem. 96, 381 (1992). Energetic and structural data are discussed in terms of a model in which the holes have significant oxygen character [A. Mehta, J. DiCarlo, and A. Navrotsky, J. Solid State Chem. 101, 173 (1992).].",

author = "Joseph DiCarlo and Iman Yazdi and Jacobson, {Allan J.} and Alexandra Navrotsky",

year = "1994",

month = apr,

doi = "10.1006/jssc.1994.1096",

language = "English (US)",

volume = "109",

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journal = "Journal of Solid State Chemistry",

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publisher = "Academic Press Inc.",

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T1 - Preparation and thermochemical properties of BaNiO2+x

AU - DiCarlo, Joseph

AU - Yazdi, Iman

AU - Jacobson, Allan J.

AU - Navrotsky, Alexandra

PY - 1994/4

Y1 - 1994/4

N2 - Single crystals of BaNiO3 have been synthesized in molten KOH. The enthalpies of formation from the component oxides at 25°C of BaNiO2, BANiO2.63, and BaNiO3 have been measured using high temperature reaction calorimetry. As the value of x increases in BaNiO2+x, the enthalpy of formation becomes more exothermic. From the enthalpy of formation data, an enthalpy of oxidation of -196 ± 20 kJ/(mole O2) was obtained. This value is very similar to the values of -202 ± 18 and -220 ± 50 kJ/(mole O2) obtained for YBa2Cu3O7-y and La2-xBaxCuO4-y, respectively Z. Zhou, and A. Navrotsky, J. Mater. Res. 7(11), 2920 (1992); J. DiCarlo, J. Bularzik, and A. Navrotsky, J. Solid State Chem. 96, 381 (1992). Energetic and structural data are discussed in terms of a model in which the holes have significant oxygen character [A. Mehta, J. DiCarlo, and A. Navrotsky, J. Solid State Chem. 101, 173 (1992).].

AB - Single crystals of BaNiO3 have been synthesized in molten KOH. The enthalpies of formation from the component oxides at 25°C of BaNiO2, BANiO2.63, and BaNiO3 have been measured using high temperature reaction calorimetry. As the value of x increases in BaNiO2+x, the enthalpy of formation becomes more exothermic. From the enthalpy of formation data, an enthalpy of oxidation of -196 ± 20 kJ/(mole O2) was obtained. This value is very similar to the values of -202 ± 18 and -220 ± 50 kJ/(mole O2) obtained for YBa2Cu3O7-y and La2-xBaxCuO4-y, respectively Z. Zhou, and A. Navrotsky, J. Mater. Res. 7(11), 2920 (1992); J. DiCarlo, J. Bularzik, and A. Navrotsky, J. Solid State Chem. 96, 381 (1992). Energetic and structural data are discussed in terms of a model in which the holes have significant oxygen character [A. Mehta, J. DiCarlo, and A. Navrotsky, J. Solid State Chem. 101, 173 (1992).].

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Preparation and thermochemical properties of BaNiO_2+x

Abstract

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