Thermodynamic consistencies and anomalies among end-member lanthanoid garnets
Lanthanoid (or lanthanide) garnets are ionic solids of technological importance in their use in electronic materials. They are also of interest in respect of their systematic relationships and as geochemical tracers. As a consequence, there is considerable published thermodynamic information for the...
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| Format: | Journal Article |
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Academic Press
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/26534 |
| _version_ | 1848752014051246080 |
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| author | Glasser, Leslie |
| author_facet | Glasser, Leslie |
| author_sort | Glasser, Leslie |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Lanthanoid (or lanthanide) garnets are ionic solids of technological importance in their use in electronic materials. They are also of interest in respect of their systematic relationships and as geochemical tracers. As a consequence, there is considerable published thermodynamic information for these garnets. Based principally on the computational results of Moretti and Ottonello (1998) [8], we here examine the thermodynamic information for consistencies and anomalies among the ferri-, alumino-, and gallo-garnets using relations between thermodynamic properties that we have established over recent years. The principal properties of interest are formula volume, heat capacity, entropy, and formation enthalpy (from which the Gibbs free energy may be obtained), and isothermal compressibility. We also establish additive single-ion values for trivalent lanthanide cations which may be applied in estimating properties for related materials. Since the results of the work of Moretti and Ottonello are based upon consistent computational analyses, we should expect generally smooth relations. These are, indeed, found for various of the properties (except for the europium garnets), with some uncertainty in the absolute entropies, and anomalies in the formation enthalpies of europium and ytterbium/lutetium garnets. The results of some more recent experimental work are included in our analyses. Values for the (unknown) promethium garnets are estimated by averaging the properties of the neighbouring neodymium and samarium garnets. |
| first_indexed | 2025-11-14T08:01:53Z |
| format | Journal Article |
| id | curtin-20.500.11937-26534 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:01:53Z |
| publishDate | 2014 |
| publisher | Academic Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-265342019-02-19T04:28:17Z Thermodynamic consistencies and anomalies among end-member lanthanoid garnets Glasser, Leslie Thermodynamics Solid state Lanthanides Ionic materials Lanthanoids Garnets Lanthanoid (or lanthanide) garnets are ionic solids of technological importance in their use in electronic materials. They are also of interest in respect of their systematic relationships and as geochemical tracers. As a consequence, there is considerable published thermodynamic information for these garnets. Based principally on the computational results of Moretti and Ottonello (1998) [8], we here examine the thermodynamic information for consistencies and anomalies among the ferri-, alumino-, and gallo-garnets using relations between thermodynamic properties that we have established over recent years. The principal properties of interest are formula volume, heat capacity, entropy, and formation enthalpy (from which the Gibbs free energy may be obtained), and isothermal compressibility. We also establish additive single-ion values for trivalent lanthanide cations which may be applied in estimating properties for related materials. Since the results of the work of Moretti and Ottonello are based upon consistent computational analyses, we should expect generally smooth relations. These are, indeed, found for various of the properties (except for the europium garnets), with some uncertainty in the absolute entropies, and anomalies in the formation enthalpies of europium and ytterbium/lutetium garnets. The results of some more recent experimental work are included in our analyses. Values for the (unknown) promethium garnets are estimated by averaging the properties of the neighbouring neodymium and samarium garnets. 2014 Journal Article http://hdl.handle.net/20.500.11937/26534 10.1016/j.jct.2014.06.013 Academic Press fulltext |
| spellingShingle | Thermodynamics Solid state Lanthanides Ionic materials Lanthanoids Garnets Glasser, Leslie Thermodynamic consistencies and anomalies among end-member lanthanoid garnets |
| title | Thermodynamic consistencies and anomalies among end-member lanthanoid garnets |
| title_full | Thermodynamic consistencies and anomalies among end-member lanthanoid garnets |
| title_fullStr | Thermodynamic consistencies and anomalies among end-member lanthanoid garnets |
| title_full_unstemmed | Thermodynamic consistencies and anomalies among end-member lanthanoid garnets |
| title_short | Thermodynamic consistencies and anomalies among end-member lanthanoid garnets |
| title_sort | thermodynamic consistencies and anomalies among end-member lanthanoid garnets |
| topic | Thermodynamics Solid state Lanthanides Ionic materials Lanthanoids Garnets |
| url | http://hdl.handle.net/20.500.11937/26534 |