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Calciobetafite (of Mazzi & Munno)

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For a mineral with the betafite structure with high CALCIum content.
A variety of Pyrochlore Group

A dicredited mineral, earlier defined as a betafite. According to the new nomenclature of the Pyrochlore Supergroup (Atencio et al. 2010) "betafite" is defined as a calcium-rich and Ti-dominant pyrochlore. The type calciobetafite is Nb-dominant, not Ti-dominant and belongs to the pyrochlore group).

Hogarth (1977) defined betafite as a uranium-rich Ti-dominant pyrochlore, hence the origin of calciobetafite, a calcium-dominant Ti-rich pyrochlore (Mazzi & Munno 1983). However, all published analytical data on (non-defect) betafite have Ca in excess of U [except the mineral from the Moon studied by Mokhov et al. (2008), which is oxyuranobetafite]. This renders the name calciobetafite redundant, and has the added effect of bringing members of the betafite group in line with the other groups (Atencio et al. 2010).

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Classification of Calciobetafite (of Mazzi & Munno)Hide

Approval History:
Approved by IMA in 1982, as calciobetafite= an uranium-rich Ti-dominant pyrochlore.
Discredited by IMA 2012 (Atencio et al. 2010, 2012 IMA Report)

18 : Niobates and Tantalates
4 : Niobates and tantalates containing both U and rare earths

Chemical Properties of Calciobetafite (of Mazzi & Munno)Hide


Synonyms of Calciobetafite (of Mazzi & Munno)Hide

Other Language Names for Calciobetafite (of Mazzi & Munno)Hide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Quartz6 photos of Calciobetafite (of Mazzi & Munno) associated with Quartz on
Willemite3 photos of Calciobetafite (of Mazzi & Munno) associated with Willemite on
Calcite3 photos of Calciobetafite (of Mazzi & Munno) associated with Calcite on

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

18.4.1Uranpyrochlore (of Hogarth 1977)(U,Ca,Ce)2(Nb,Ta)2O6(OH,F)Iso.
18.4.5Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6Orth. mmm (2/m 2/m 2/m)
18.4.7Kobeite-(Y)(REE,Fe,U)3 Zr(Ti,Nb)3 O12
18.4.8Polycrase-(Y)Y(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m)
18.4.9Yttropyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
18.4.11Yttrobetafite (of Hogarth 1977)A2-mB2X6-wY1-n
18.4.12Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8Orth. mmm (2/m 2/m 2/m) : Pbcn

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Calciobetafite (of Mazzi & Munno)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hogarth, D.D. (1977) Classification and nomenclature of the pyrochlore group. American Mineralogist: 62: 403-410.
Mazzi, F. and Munno, R. (1983) Calciobetafite (new mineral of the pyrochlore group) and related minerals from Campi Flegrei, Italy; crystal structures of polymignite, and zirkelite: comparison with pyrochlore and zirconolite. American Mineralogist: 68: 262-276.
Atencio D., Andrade M.B., Christy A.G., Giere R., Kartashov P.M. (2010): The pyrochlore supergroup of minerals: nomenclature. Canadian Mineralogist, 48, 569-594.

Internet Links for Calciobetafite (of Mazzi & Munno)Hide

Localities for Calciobetafite (of Mazzi & Munno)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Rhineland-Palatinate
    • Eifel
      • Laach lake volcanic complex
        • Kruft
Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag, München (2. Auflage), 1987
        • Mendig
          • Niedermendig
Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag, München (2. Auflage), 1987
Hentschel, G., Die Mineralien der Eifelvulkane. Weise Verlag, München (2. Auflage), 1987
      • Mayen
        • Ettringen
          • Bellerberg volcano
[Blass, G., Graf, H.W., Neufunde von bekannten Fundorten (VI), Mineralien-Welt 3/6,32-35, 1992]
  • Campania
    • Phlegrean Volcanic Complex
      • Naples Province
        • Phlegrean Fields
Mazzi, F. and Munno, R. (1983) Calciobetafite (new mineral of the pyrochlore group) and related minerals from Campi Flegrei, Italy; crystal structures of polymignite, and zirkelite: comparison with pyrochlore and zirconolite. American Mineralogist: 68: 262-276.
  • Latium
    • Rome Province
      • Sacrofano Caldera
        • Campagnano di Roma
Della Ventura, G.,Bellatreccia, F., Caprilli, E., Rossi, P., Tamagnini, F., Fiori, S. (2004): Dieci anni di micromineralogia laziale. Il Cercapietre. Not. del Gruppo Mineralogico Romano, 1-2: 4-30
    • Viterbo Province
      • Vico volcanic complex (Vico Lake)
No reference listed
Knut Edvard Larsen collection (Collected by Rossini Carlo in 2001, analyzed by Prof. Caprilli in 2004)
  • Veneto
    • Padova Province
      • Euganei Hills
        • Torreglia
          • Luvigliano
Orlandi, P. (1997): Zibaldone di mineralogia italiana. Rivista mineralogica italiana, (2), 1997, 179-185
  • Småland
    • Vetlanda
      • Alseda
J.Langhof: REE-mineralogy in Mo-granite pegmatites in Vetlanda-area, Småland,Sweden. 1991
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