| Reference Type | Journal (article/letter/editorial) |
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| Title | Rinkite, cerianite-(Ce), and hingganite-(Ce) in syenite gneisses from the Sushina Hill Complex, India: occurrence, compositional data and petrogenetic significance |
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| Journal | Mineralogical Magazine |
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| Authors | Chakrabarty, A. | Author |
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| Mitchell, R. H. | Author |
| Ren, M. | Author |
| Sen, A. K. | Author |
| Pruseth, K. L. | Author |
| Year | 2013 (December) | Volume | 77 |
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| Issue | 8 |
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| Publisher | Mineralogical Society |
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| DOI | doi:10.1180/minmag.2013.077.8.08Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 244470 | Long-form Identifier | mindat:1:5:244470:7 |
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| GUID | 0 |
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| Full Reference | Chakrabarty, A., Mitchell, R. H., Ren, M., Sen, A. K., Pruseth, K. L. (2013) Rinkite, cerianite-(Ce), and hingganite-(Ce) in syenite gneisses from the Sushina Hill Complex, India: occurrence, compositional data and petrogenetic significance. Mineralogical Magazine, 77 (8) 3137-3153 doi:10.1180/minmag.2013.077.8.08 |
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| Plain Text | Chakrabarty, A., Mitchell, R. H., Ren, M., Sen, A. K., Pruseth, K. L. (2013) Rinkite, cerianite-(Ce), and hingganite-(Ce) in syenite gneisses from the Sushina Hill Complex, India: occurrence, compositional data and petrogenetic significance. Mineralogical Magazine, 77 (8) 3137-3153 doi:10.1180/minmag.2013.077.8.08 |
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| Abstract/Notes | AbstractAccessory rare earth element (REE) minerals occur in small quantities in agpaitic and miaskitic nepheline syenite gneisses of the Sushina Hill Complex, India. The REE-rich minerals restricted mainly to the agpaitic rocks are rinkite, cerianite-(Ce), and cerian thorite. Rinkite, formed at the ortho-magmatic stage predates other REE-rich phases and is the most Nd-F-rich rinkite (6.62–7.45 wt.% Nd2O3; 8.75–9.74 wt.% F) with very high Nd/Ce (>2.46) ratios reported to date. Hydrothermal cerianite-(Ce), formed by the decomposition of eudialyte in the agpaitic rocks, occurs as small rounded crystals rich in Ce (∼63–74 wt.% CeO2) and Y (6.03–11.69 wt.% Y2O3). The presence of cerianite-(Ce) indicates formation in an evolving hydrothermal fluid in an oxidizing milieu. Hingganite-(Ce) is present in the miaskitic unit and is considered to represent the superposition of an agpaitic mineral on an initial miaskitic assemblage. Hingganite-(Ce) is characterized by elevated contents of Ce (18.03–21.94 wt.% Ce2O3), and Nd (13.90–15.40 wt.% Nd2O3). Experimental data, coupled with the observed assemblage, suggest that the hingganite-(Ce) precipitated from the hydrothermal fluid between 400 and 300°C followed by cerianite-(Ce) (<∼300°C). This conclusion implies that eudialyte decomposition was probably initiated above 400°C. |
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