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Monazite-huttonite solid-solutions from the Vico Volcanic Complex, Latium, Italy

Published online by Cambridge University Press:  05 July 2018

Giancarlo Della Ventura ,
Annibale Mottana ,
Gian Carlo Parodi ,
Mati Raudsepp ,
Fabio Bellatreccia ,
Enrico Caprilli ,
Paolo Rossi  and
Salvatore Fiori
Giancarlo Della Ventura
Affiliation:
Dipartimento di Scienze Geologiche, Università di Roma Tre, Via Ostiense 169, I-00154 Roma, Italy
Annibale Mottana
Affiliation:
Dipartimento di Scienze Geologiche, Università di Roma Tre, Via Ostiense 169, I-00154 Roma, Italy
Gian Carlo Parodi
Affiliation:
Museo di Mineralogia, Università di Roma “La Sapienza”, Piazzale Aldo Moro 5, I-00185 Roma, Italy
Mati Raudsepp
Affiliation:
Department of Geological Sciences, University of British Columbia, 6339 Stores Road, Vancouver, B.C. V6T 1Z4, Canada
Fabio Bellatreccia
Affiliation:
Dipartimento di Scienze della Terra, Università di Roma “La Sapienza”, Piazzale Aldo Moro 5, I-00185 Roma, Italy
Enrico Caprilli
Affiliation:
Dipartimento di Scienze della Terra, Università di Roma “La Sapienza”, Piazzale Aldo Moro 5, I-00185 Roma, Italy
Paolo Rossi
Affiliation:
Dipartimento di Scienze della Terra, Università di Roma “La Sapienza”, Piazzale Aldo Moro 5, I-00185 Roma, Italy
Salvatore Fiori
Affiliation:
Dipartimento di Scienze della Terra, Università di Roma “La Sapienza”, Piazzale Aldo Moro 5, I-00185 Roma, Italy
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Abstract

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.

Keywords

monazitehuttoniteLatiumItalycell parameterscrystal-chemistry
Type
Mineralogy
Information
Mineralogical Magazine , Volume 60 , Issue 402 , October 1996 , pp. 751 - 758
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1996

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Footnotes

*

Present address: Museum National d'Histoire Naturelle, Laboratoire de Mineralogie, 61, rue Buffon, 75005 Paris, France.

References

Boatner, L.A., Beall, G.W., Abraham, M.M., Finch, C.B., Huray, P.G. and Rappaz, M. (1980) Monazite and other lanthanide orthophosphates as alternate actinide waste forms. In Scientific basis for nuclear waste management, 2 (Northrup, C.J.M. Jr., Ed.), Plenum Press, New York.Google Scholar
Bonatti, S. and Gottardi, G. (1950) Perrierite, nuovo minerale ritrovato nella sabbia di Nettuno (Roma). Atti Acc. Naz. Lincei, Rend. cl. Sc. Mat. Fis. Nat.s. 8, 9, 361–8,Google Scholar
Bowie, S.H.U. and Horne, J.E.T. (1953) Cheralite, a new mineral of the monazite group. Mineral. Mag., 30, 93–9.Google Scholar
Bowles, J.F.W., Jobbins, E.A. and Young, B.R. (1980) A re-examination of cheralite. Mineral. Mag., 43, 885–8.CrossRefGoogle Scholar
Della Ventura, G., Parodi, G.C., Mottana, A. and Chaussidon, M. (1993) Peprossiite-(Ce), a new mineral from Campagnano (Italy): the first anhydrous rare-earth-element borate. Eur. J. Mineral., 5 53–8.CrossRefGoogle Scholar
Demartin, F., Pilati, T., Diella, V., Donzelli, S. and Gramaccioli, C.M. (1991) Alpine monazite: further data. Canad. Mineral., 29, 61–67.Google Scholar
Demartin, F., Gramaccioli, C.M. and Pilati, T. (1994) Paraniite-(Y), a new tungstate arsenate mineral from alpine fissures. Schweiz. Mineral. Petrol Mitt., 74, 155–160.Google Scholar
Drake, M.J. and Weill, D.F. (1972) New rare earth element standards for electron microprobe. Chem. Geol, 10, 179–81.CrossRefGoogle Scholar
Federico, M., Peccerillo, A., Barbieri, M. and Wu, T.W. (1994) Mineralogical and geochemical study of granular xenoliths from the Alban Hills volcano, Central Italy; bearing on evolutionary processes in potassic magma chambers. Contrib. Mineral Petrol., 115, 384–401.CrossRefGoogle Scholar
Finney, J.J. and Rao, N.N. (1967) The crystal structure of cheralite. Amer. Mineral., 52, 13–19.Google Scholar
Fleischer, M. and Altschuler, Z.S. (1969) The relationship of the rare-earth composition of minerals to geological environment. Geochim. Cosmochim. Acta, 33, 725–32.CrossRefGoogle Scholar
Fleischer, M. and Rosenblum, S. (1990) The distribution of lanthanides and yttrium in the minerals of the monazite family. U.S. Geol. Surv., Open-File Repts. Google Scholar
Gottardi, G. (1952) La sabbia di Nettuno (Roma). Atti Soc. Tosc. Sc. Nat. Mem., 59, 36–62.Google Scholar
Graeser, S. and Schwander, H. (1987) Gasparite-(Ce) and monazite-(Nd): two new minerals of the monazite group from the Alps. Schweiz. Mineral Petrol. Mitt., 67, 103–113.Google Scholar
Gramaccioli, C.M. and Segalstad, T.V. (1978) A uranium- and thorium-rich monazite from a south- alpine pegmatite at Piona, Italy. Amer. Mineral., 63, 757–61.Google Scholar
Hanson, S.L., Simmons, W.B., Webber, K.L. and Falster A.U. (1992) Rare-earth-element mineralogy of granitic pegmatites in the Trout Creek Pass district, Chaffee county, Colorado. Canad. Mineral., 30, 673–86.Google Scholar
Kato, T. (1958) A study on monazite from the Ebisu Mine, Gifu Prefecture. Mineral. J., 4, 224—35.CrossRefGoogle Scholar
Kucha, H. (1980) Continuity in the monazite-huttonite series. Mineral. Mag., 43, 1031–4.CrossRefGoogle Scholar
Lee, D.E. and Bastron, H. (1967) Fractionation of rare- earth elements in allanite and monazite as related to geology of the Mt. Wheeler mine area, Nevada. Geochim. Cosmochim. Acta, 31, 339–56.CrossRefGoogle Scholar
Locardi, E. (1965) Tipi di ignimbriti di magmi mediterranei: il vulcano di Vico. Atti Soc. Tosc. Sc. Nat., 45, 55–173.Google Scholar
Mannucci, G., Diella, V., Gramaccioli, C.M. and Pilati, T. (1986) A comparative study of some pegmatitic and fissure monazite from the Alps. Canad. Mineral., 24, 469–74.Google Scholar
Mooney, R.C.L. (1948) Crystal structures of a series of rare earth phosphates. J. Chem. Phys., 16, 1003.CrossRefGoogle Scholar
Murata, K.J., Rose, H.J. jr. and Carron, M.K. (1953) Systematic variation of rare earths in monazite. Geochim. Cosmochim. Acta, 4, 292—300.CrossRefGoogle Scholar
Murata, K.J., Rose, H.J. jr., Carron, M.K. and Glass, J.J. (1957) Systematic variation of rare-earth elements in cerium-earth minerals. Geochim. Cosmochim. Acta, 11, 141–61.CrossRefGoogle Scholar
Murata, K.J., Dutra, C.V., Teixeira da Costa, M. and Branco, J.J.R. (1958) Composition of monazites from pegmatites in eastern Minas Gerais, Brasil. Geochim. Cosmochim. Acta, 16, 1 — 14.Google Scholar
Pabst, A. and Hutton, C.O. (1951) Huttonite, a new monoclinic thorium silicate. Amer. Mineral., 36, 60–9.Google Scholar
Pavlenko, A.S., Orlova, L.P. and Akhmanova, M.V. (1965) Cerphosphorhuttonite, a monazite-group mineral. Trudy Mineral Muzeya Akad. Nauk SSSR, 16, 166—74 (in RussianGoogle Scholar
Petruk, W. and Owens, D. (1975) Monazite from the Mount Pleasant deposit, New Brunswick. Canad. Mineral., 13, 298–9.Google Scholar
Read, D., Cooper, D.C. and McArthur, J.M. (1987) The composition and distribution of nodular monazite in the Lower Palaeozoic rocks of Great Britain. Mineral. Mag., 51, 271–80.CrossRefGoogle Scholar
Semenov, E.I. (1963) Mineralogy of the rare earths. USSR Academy of Sciences Moskow (in Russian).Google Scholar
Shannon, R.D. (1976) Revised effective ionic radii and systematic studies of interatomic distances in halides and calcogenides. Acta Crystallogr. A32, 751—67.CrossRefGoogle Scholar
Starynkevitch, I. (1922) The chemical formula of monazite and several analyses of Russian monazites. Doklady Akad. Nauk S.S.S.R., 31, 28–30.(in Russian).Google Scholar
Taylor, M. and Ewing, R.C. (1978) The crystal structures of the ThSi04 polymorphs: huttonite and thorite. Acta Crystallogr. B34, 1074—9.CrossRefGoogle Scholar
Ueda, T. (1967) Reexamination of the crystal structure of monazite. J. Jpn. Assoc. Mineral, Petrol Econ. GeoL, 58, 170–9.CrossRefGoogle Scholar
Vainshtein, E.E., Tugariniv A.I. and Turanskaya, V.I. (1956) Regularities in the distribution of rare earths in certain minerals. Geochemistry, 2, 159—78.Google Scholar
von Knorring, O. and Clifford, T.N. (1960) On a skarn monazite occurrence from the Namib desert near Usakos, South-West Africa. Mineral. Mag., 32, 650–3.Google Scholar