Structure, spectra, and stability of solid bismuth carbonates

Taylor, Peter G.; Sunder, S.; Lopata, V. J.

doi:10.1139/v84-484

Cited by 111 publications

(92 citation statements)

References 16 publications

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“…This probably has some bearing on the occurrence of the minerals bismoclite and daubreeite. The narrow stability field of Bi12017C12 is consistent with its apparent absence in nature; similar observations have been made (10,21) on the absence or scarcity of (Bi0)4(0H)2C03 (basobismutite?) and Pb100(OH)6(C03)6 (plumbonacrite).…”

Section: (C) Deduction Of Phase Relationshipssupporting

confidence: 82%

“…This reaction is a major limiting factor on the performance of the suggested bismuth oxyiodide waste form for iodine-129 (1 1, 27). Bismutite ((Bi0)2C03), however, is sufficiently stable that exchange reactions with chloride are unlikely to limit its performance as a waste form for carbon-14 (10,22).…”

Section: ( E ) Comparison With Other Basic Bismuth Saltsmentioning

confidence: 99%

“…We have recentlv measured the stabilitv limits of basic bismuth carbonates and iodides in aqueous solutions at or near 25°C (10,11). Some of these compounds show promise as waste forms for immobilization and disposal of 14C and 1291, which are long-lived radioactive waste products from nuclear power generation.…”

Section: Introductionmentioning

confidence: 99%

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Some phase relationships between basic bismuth chlorides in aqueous solutions at 25 °C

Taylor¹,

Lopata²

1987

Can. J. Chem.

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Observations are reported on the interconversion of solid α-Bi2O3, Bi12O17Cl2, BiOCl, and a daubréeite-like phase tentatively identified as Bi2O2(OH)Cl, in aqueous chloride solutions at 25 °C. Equilibrium constants, K, for these interconversions are expressed as anion activity ratios, {Cl−}/{OH−}. Experimental values of K for equilibrium between Bi2O3 and each of the chlorides are 100.56 ± 0.20 for Bi12O17Cl2, 101.5 ± 0.4 for Bi2O2(OH)Cl, and 103.13 ± 0.04 for BiOCl; the fatter two represent metastable equilibria. These equilibrium constants yielded the following estimates of Gibbs energies of formation: Bi12O17Cl2, −3141 ± 6 kJ mol−1;"Bi2O2(OH)Cl", −696 ± 4 kJ mol−1; BiOCl, −321.5 ± 1.3 kJ mol−1. Phase relationships among these solids are discussed, with reference to natural occurrence, other bismuth oxychlorides, and the stability of other basic salts of bismuth.

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Section: (C) Deduction Of Phase Relationshipssupporting

confidence: 82%

Section: ( E ) Comparison With Other Basic Bismuth Saltsmentioning

confidence: 99%

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Some phase relationships between basic bismuth chlorides in aqueous solutions at 25 °C

Taylor¹,

Lopata²

1987

Can. J. Chem.

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“…1; the 25°C data are taken from ref. 1. In all cases there is a slight systematic decrease in apparent K, with increasing pH.…”

Section: Results and Discussion (A) Aqueous Equilibria (I) Isothermalmentioning

confidence: 78%

“…The phase assemblage a -B i 2 0 3 + a-Bi5071 has been considered as a candidate material for immobilizing radioactive iodine-129 (1,2). This combination of solids can buffer the dissolved iodide activity, {I-), at low levels in non-acidic aqueous solutions, in accordance with equilibrium [ l ] .…”

Section: Introductionmentioning

confidence: 99%

Equilibria between Bi₂O₃ and Bi₅O₇I in aqueous solutions at 10–60 °C, and in oxygen atmospheres at 550–800 °C

Taylor¹,

Lopata²

1988

Can. J. Chem.

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PETER TAYLOR and VINCENT J. LOPATA. Can. J. Chem. 66,2664Chem. 66, (1988 Equilibria between Bi5071 and Bi203 have been measured with the solids in contact with aqueous solutions at 10-60°C, and with low-pressure oxygen (0.2-100 kPa) at 550-800°C. In the aqueous systems, iodide activities were measured as functions of pH and temperature. In the dry system, iodine partial pressures were measured spectrophotometrically while varying the temperature and oxygen partial pressure. The standard enthalpy of formation and entropy of a-Bi5071 were derived from these measurements, and values for BiOI were also estimated. The results combine to give a self-consistent account of phase relations between Bi5071 and Bi203 up to 800°C. Some equilibria involving BiOI are discussed briefly.PETER TAYLOR et VINCENT J. LOPATA. Can. J. Chem. 66, 2664 (1988). On a mesurt 1'Cquilibre entre le Bi5071 et le Bi203 alors que les solides Ctaient en contact avec des solutions aqueuses, h 10-60°C ou de l'oxygkne a basse pression (0,2 a 100 kPa), h des temptratures allant de 550 h 800°C. Dans les systkmes aqueux, on a mesure les activitts de l'iode en fonction du pH et de la temperature. Dans le systkme sec, on a fait appel a des mtthodes spectrophotomttriques pour mesurer les pressions partielles de l'iode tout en faisant varier la temperature ainsi que la pression partielle de l'oxygene. A I'aide deces mesures, on a calculC l'enthalpie standard deformation ainsi que I'entropie du a-Bi5O7I et on a Cvalut les valeurs correspondantes pour le BiOI. On peut combiner les rtsultats pour obtenir une tvaluation auto-cohtrente des relations de phase entre le Bi5071 et le Bi203, jusqu'h 800°C. On discute brikvement de quelques tquilibres impliquant le BiOI.[Traduit par la revue]

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Nanocatalytic Architecture for the Selective Dehydrogenation of Formic Acid

Bağuç

Kanberoğlu

Yurderi

et al. 2021

Nanoparticles in Catalysis

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Structure, spectra, and stability of solid bismuth carbonates

Cited by 111 publications

References 16 publications

Some phase relationships between basic bismuth chlorides in aqueous solutions at 25 °C

Some phase relationships between basic bismuth chlorides in aqueous solutions at 25 °C

Equilibria between Bi₂O₃ and Bi₅O₇I in aqueous solutions at 10–60 °C, and in oxygen atmospheres at 550–800 °C

Nanocatalytic Architecture for the Selective Dehydrogenation of Formic Acid

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Structure, spectra, and stability of solid bismuth carbonates

Cited by 111 publications

References 16 publications

Some phase relationships between basic bismuth chlorides in aqueous solutions at 25 °C

Some phase relationships between basic bismuth chlorides in aqueous solutions at 25 °C

Equilibria between Bi2O3 and Bi5O7I in aqueous solutions at 10–60 °C, and in oxygen atmospheres at 550–800 °C

Nanocatalytic Architecture for the Selective Dehydrogenation of Formic Acid

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Product

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Equilibria between Bi₂O₃ and Bi₅O₇I in aqueous solutions at 10–60 °C, and in oxygen atmospheres at 550–800 °C