| Reference Type | Journal (article/letter/editorial) |
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| Title | Experimental study of the equilibrium between pollucite, albite and hydrothermal fluid in pegmatitic systems |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Sebastian, Ansom | Author |
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| Lagache, Martine | Author |
| Year | 1990 (September) | Volume | 54 |
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| Issue | 376 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_54/54-376-447.pdf+ |
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| DOI | doi:10.1180/minmag.1990.054.376.10Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 1639 | Long-form Identifier | mindat:1:5:1639:5 |
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| GUID | 0 |
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| Full Reference | Sebastian, Ansom, Lagache, Martine (1990) Experimental study of the equilibrium between pollucite, albite and hydrothermal fluid in pegmatitic systems. Mineralogical Magazine, 54 (376) 447-454 doi:10.1180/minmag.1990.054.376.10 |
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| Plain Text | Sebastian, Ansom, Lagache, Martine (1990) Experimental study of the equilibrium between pollucite, albite and hydrothermal fluid in pegmatitic systems. Mineralogical Magazine, 54 (376) 447-454 doi:10.1180/minmag.1990.054.376.10 |
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| In | (1990, September) Mineralogical Magazine Vol. 54 (376) Mineralogical Society |
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| Abstract/Notes | AbstractPollucite is a silicate mineral of the rare element caesium, occurring in granitic pegmatites. Experiments have been carried out at 450, 600, and 750°C, 1.5 kbar, to study the equilibrium between pollucite, albite and the co-existing hydrothermal solution. When pollucite co-exists with albite, the alkaline composition of the solution is buffered. The Cs/Na ratio of the solution has been determined to be 0.11 at 450°C 0.22 at 600°C and 0.23 at 750°C. Pollucite contains about 15 mol.% of sodium, whereas albite is almost purely sodic. In nature, pollucite with more than 82 mol.% caesium has never been found. This can be explained by the absence of solutions in granitic pegmatites having a higher Cs/Na ratio than those determined by us. |
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