| Reference Type | Journal (article/letter/editorial) |
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| Title | High-temperature diffusion of oxygen in synthetic diopside measured by nuclear
reaction analysis |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Pacaud, L. | Author |
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| Ingrin, J. | Author |
| Jaoul, O. | Author |
| Year | 1999 (October) | Volume | 63 |
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| Issue | 5 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_63/63-5-673.pdf+ |
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| DOI | doi:10.1180/002646199548835Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 1315 | Long-form Identifier | mindat:1:5:1315:8 |
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| GUID | 0 |
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| Full Reference | Pacaud, L., Ingrin, J., Jaoul, O. (1999) High-temperature diffusion of oxygen in synthetic diopside measured by nuclear
reaction analysis. Mineralogical Magazine, 63 (5) 673-686 doi:10.1180/002646199548835 |
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| Plain Text | Pacaud, L., Ingrin, J., Jaoul, O. (1999) High-temperature diffusion of oxygen in synthetic diopside measured by nuclear
reaction analysis. Mineralogical Magazine, 63 (5) 673-686 doi:10.1180/002646199548835 |
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| Abstract/Notes | AbstractWe have performed O self-diffusion experiments in synthetic diopside single crystals along the b-axis at temperatures ranging from 1473–1643 K, under controlled O partial pressure (10−11–10−2 atm). The 18O tracer diffusion was imposed by solid/gas exchange between 16O in diopside and 18O2-enriched argon-hydrogen-H2O gas mixture. Diffusion profiles of 18O were measured by Nuclear Reaction Analysis 18O (p,α) 15N. The diffusion coefficients are described by , with log D0(m2/s)=−9.2 ± 1.0 and E 310 ± 30 kJ/mol.Our results are in agreement with Ryerson and McKeegan's (1994) data and Farver's (1989) data along a direction perpendicular to the c direction. Experiments performed in a wide pO2 range show that D is independent of pO2.We observe no change in the diffusion regime up to 1643 K (i.e. 22 K prior to melting temperature). This result differs from the diffusion study of Ca in diopside by Dimanov and Ingrin (1995), where a strong enhancement of Ca mobility, attributed to an excess disorder in the Ca-sublattice, was observed above 1523 K. We conclude that O diffusion in diopside is not affected by this premelting phenomenon. |
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