| Reference Type | Journal (article/letter/editorial) |
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| Title | Monazite-huttonite solid-solutions from the Vico Volcanic Complex, Latium, Italy |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Della Ventura, Giancarlo | Author |
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| Mottana, Annibale | Author |
| Parodi, Gian Carlo | Author |
| Raudsepp, Mati | Author |
| Bellatreccia, Fabio | Author |
| Caprilli, Enrico | Author |
| Rossi, Paolo | Author |
| Fiori, Salvatore | Author |
| Year | 1996 (October) | Volume | 60 |
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| Issue | 402 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_60/60-402-751.pdf+ |
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| DOI | doi:10.1180/minmag.1996.060.402.04Search in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 92 | Long-form Identifier | mindat:1:5:92:9 |
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| GUID | 0 |
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| Full Reference | Della Ventura, Giancarlo, Mottana, Annibale, Parodi, Gian Carlo, Raudsepp, Mati, Bellatreccia, Fabio, Caprilli, Enrico, Rossi, Paolo, Fiori, Salvatore (1996) Monazite-huttonite solid-solutions from the Vico Volcanic Complex, Latium, Italy. Mineralogical Magazine, 60 (402) 751-758 doi:10.1180/minmag.1996.060.402.04 |
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| Plain Text | Della Ventura, Giancarlo, Mottana, Annibale, Parodi, Gian Carlo, Raudsepp, Mati, Bellatreccia, Fabio, Caprilli, Enrico, Rossi, Paolo, Fiori, Salvatore (1996) Monazite-huttonite solid-solutions from the Vico Volcanic Complex, Latium, Italy. Mineralogical Magazine, 60 (402) 751-758 doi:10.1180/minmag.1996.060.402.04 |
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| In | (1996, October) Mineralogical Magazine Vol. 60 (402) Mineralogical Society |
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| Abstract/Notes | The crystal-chemical relationships occurring within a single grain of monazite-(Ce) from Vetralla, Vico Volcanic Complex, north of Rome, are outlined. The sample is from a miarolitic cavity in a holocrystalline ejectum consisting of K-feldspar plus minor plagioclase, mica and Fe-oxides, collected from a pyroclastic explosive level. The Gandolfi film (Cu-Kα radiation) can be indexed in space group P21/n with a = 6.816(4); b = 6.976(4); c = 6.471(3) Å; β = 103.63(3)°; V = 299.0(6) Å3. Electron-probe microanalyses plot within the field of monazite along the huttonite-monazite edge of the huttonite-monazite-brabantite triangle. Despite patchy and irregular zoning, the grain shows a clear enrichment towards pure monazite at the outer rim. A constant Th:Si ratio of 1:1 indicates the existence of a simple solid-solution between huttonite and monazite. The substitution can be written as Th4+ + Si4+ → REE3+ + P5+ without requiring any electrostatic compensation by divalent cations, or by anionic groups. The REE distribution pattern is compatible with that of monazites from syenitic rocks. |
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