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Calciobetafite (of Mazzi & Munno)

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Formula:
(Ca,Na)2(Nb,Ti)2(O,OH)7
Name:
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

Discredited
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)
18.4.10

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

Chemical Properties of Calciobetafite (of Mazzi & Munno)Hide

Formula:
(Ca,Na)2(Nb,Ti)2(O,OH)7

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 mindat.org.
Willemite3 photos of Calciobetafite (of Mazzi & Munno) associated with Willemite on mindat.org.
Calcite3 photos of Calciobetafite (of Mazzi & Munno) associated with Calcite on mindat.org.

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.
18.4.2Yttrocolumbite-(Y)Y(U4+,Fe2+)Nb2O8
18.4.3Yttrotantalite-(Y)(Y,U4+,Fe2+)(Ta,Nb)(O,OH)4Orth.
18.4.4IshikawaiteU4+Fe2+Nb2O8Mon.
18.4.5Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6Orth. mmm (2/m 2/m 2/m)
18.4.6Tanteuxenite-(Y)Y(Ta,Nb,Ti)2(O,OH)6
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.
Germany
 
  • 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]
Italy
 
  • 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
Sweden
 
  • Småland
    • Vetlanda
      • Alseda
J.Langhof: REE-mineralogy in Mo-granite pegmatites in Vetlanda-area, Småland,Sweden. 1991
Mineral and/or Locality  
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