Thermodynamic properties and phase transition of monoclinic terbium orthophosphate

Гавричев, К. С.; Ryumin, M. A.; Хорошилов, А.; Tyurin, A. V.; Ефимов, Н. Н.; Gurevich, V. M.; Никифорова, Г. Е.; Guskov, V. N.; Golushina, L. N.; Bryukhanova, K. I.; Kritskaya, A. P.

doi:10.1016/j.tca.2016.08.008

Cited by 9 publications

(5 citation statements)

References 19 publications

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“…There are far fewer data for xenotime. With the exception of the study of , solubility products for xenotime have only been measured at room temperature (Liu and Byrne (1997) Gavrichev et al (2006Gavrichev et al ( , 2010Gavrichev et al ( , 2012Gavrichev et al ( , 2013aGavrichev et al ( , 2013b and Gysi et al (2016). The data for Ho and Tm phosphates unfortunately are restricted to determinations of the enthalpy of formation (Navrotsky et al, 2015) and therefore, without corresponding data on the temperature dependency of heat capacity, cannot be used for calculations at elevated temperature.…”

Section: Ree Phosphates (Monazite and Xenotime)mentioning

confidence: 99%

“…In selecting the dataset appropriate for these compounds, we used the same approach as for monazite. The values of the standard Gibbs free energies were derived from the data of Liu and Byrne (1997), the values for entropy were taken from Navrotsky et al (2015), and the high-temperature heat capacity dependencies were those determined by Gavrichev et al (2006Gavrichev et al ( , 2010Gavrichev et al ( , 2012Gavrichev et al ( , 2013aGavrichev et al ( , 2013b and Gysi et al (2016). This dataset was used to calculate the solubility products for Y, Dy, Er, and Yb xenotime end-members at temperatures up to 300°C, and the resulting values compared with the experimental determinations of .…”

Section: Ree Phosphates (Monazite and Xenotime)mentioning

confidence: 99%

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Hydrothermal transport, deposition, and fractionation of the REE: Experimental data and thermodynamic calculations

et al. 2016

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For many years, our understanding of the behavior of the REE in hydrothermal systems was based on semiempirical estimates involving extrapolation of thermodynamic data obtained at 25°C (Haas et al., 1995;Wood, 1990a). Since then, a substantial body of experimental data has accumulated on the stability of aqueous complexes of the REE. These data have shown that some of the predictions of Haas et al. (1995) are accurate, but others may be in error by several orders of magnitude. However, application of the data in modeling hydrothermal transport and deposition of the REE has been severely hampered by the lack of data on the thermodynamic properties of even the most common REE minerals. The discrepancies between the predictions of Haas et al. (1995) and experimental determinations of the thermodynamic properties of aqueous REE species, together with the paucity of data on the stability of REE minerals, raise serious questions about the reliability of some models that have been proposed for the hydrothermal mobility of these critical metals. In this contribution, we review a body of high-temperature experimental data collected over the past 15 years on the stability of REE aqueous species and minerals. Using this new thermodynamic dataset, we re-evaluate the mechanisms responsible for hydrothermal transport and deposition of the REE. We also discuss the mechanisms that can result in REE fractionation during their hydrothermal transport and deposition. Our calculations suggest that in hydrothermal solutions, the main REE transporting ligands are chloride and sulfate, whereas fluoride, carbonate, and phosphate likely play an important role as depositional ligands. In addition to crystallographic fractionation, which is based on the differing affinity of mineral structures for the REE, our models suggest that the REE can be fractionated hydrothermally due to the differences in the stability of the LREE and HREE as aqueous chloride complexes.

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Section: Ree Phosphates (Monazite and Xenotime)mentioning

confidence: 99%

Section: Ree Phosphates (Monazite and Xenotime)mentioning

confidence: 99%

Hydrothermal transport, deposition, and fractionation of the REE: Experimental data and thermodynamic calculations

et al. 2016

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“…100 K and 1000 K with better accuracy (~ 1 % to 2%), enabling rather precise heat capacity measurements; commercial DSCs are widely used in industry and science and are often very conveniently automated. DSC techniques for very high (e.g., up to 1500 K [ 60 , 213 ]) and low (down to ca. 1 K [ 60 ]) have been developed, but most measurements with commercial instruments are conducted within the range 100 K to 700 K.…”

Section: Background: Heat Capacity Of Solidsmentioning

confidence: 99%

The Specific Heat of Astro-materials: Review of Theoretical Concepts, Materials, and Techniques

et al. 2022

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We provide detailed background, theoretical and practical, on the specific heat of minerals and mixtures thereof, ‘astro-materials,’ as well as background information on common minerals and other relevant solid substances found on the surfaces of solar system bodies. Furthermore, we demonstrate how to use specific heat and composition data for lunar samples and meteorites as well as a new database of endmember mineral heat capacities (the result of an extensive literature review) to construct reference models for the isobaric specific heat cP as a function of temperature for common solar system materials. Using a (generally linear) mixing model for the specific heat of minerals allows extrapolation of the available data to very low and very high temperatures, such that models cover the temperature range between 10 K and 1000 K at least (and pressures from zero up to several kbars). We describe a procedure to estimate cP(T) for virtually any solid solar system material with a known mineral composition, e.g., model specific heat as a function of temperature for a number of typical meteorite classes with known mineralogical compositions. We present, as examples, the cP(T) curves of a number of well-described laboratory regolith analogs, as well as for planetary ices and ‘tholins’ in the outer solar system. Part II will review and present the heat capacity database for minerals and compounds and part III is going to cover applications, standard reference compositions, cP(T) curves, and a comparison with new and literature experimental data.

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“…100 K and 1000 K with better accuracy (~1-2%), enabling rather precise heat capacity measurements; commercial DSCs are widely used in industry and science and are often very conveniently automated. DSC techniques for very high (e.g., up to 1500 K [51,180]) and low (down to ca. 1 K [51]) have been developed, but most measurements with commercial instruments are conducted within the range 100 -700 K.…”

Section: Differential Scanning Calorimetry (Dsc)mentioning

confidence: 99%

The specific heat capacity of astro-material I: Review of theoretical concepts, materials and techniques

Biele

Grott

Zolensky

et al. 2022

Preprint

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We provide detailed background, theoretical and practical, on the specific heat of minerals and mixtures thereof, ‘astro-materials’, as well as background information on common minerals and other relevant solid substances found on the surfaces of solar system bodies. Furthermore, we demonstrate how to use specific heat and composition data for lunar samples and meteorites as well as a new database of endmember mineral heat capacities (the result of an extensive literature review) to construct reference models for the isobaric specific heat cp as a function of temperature for common solar system materials. Using a (generally linear) mixing model for the specific heat of minerals allows extrapolation of the available data to very low and very high temperatures, such that models cover the temperature range between 10 and 1000 K at least (and pressures from zero up to several kbars). We show how to calculate model specific heat as a function of temperature for a number of typical meteorite classes with known mineralogical compositions, for well-described laboratory regolith analogues, as well as for planetary ices and ‘tholins’ in the outer solar system. We describe a procedure to estimate cp(T) for virtually any solid solar system material with a known mineral composition. Part II will present and review of the heat capacity database for minerals and compounds and part III is going to cover applications and standard reference compositions and cp(T) curves and a comparison with new and literature experimental data.

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Thermodynamic properties and phase transition of monoclinic terbium orthophosphate

Cited by 9 publications

References 19 publications

Hydrothermal transport, deposition, and fractionation of the REE: Experimental data and thermodynamic calculations

Hydrothermal transport, deposition, and fractionation of the REE: Experimental data and thermodynamic calculations

The Specific Heat of Astro-materials: Review of Theoretical Concepts, Materials, and Techniques

The specific heat capacity of astro-material I: Review of theoretical concepts, materials and techniques

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