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Calciobetafite (of Mazzi & Munno)

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Hardness:
4½ - 5½
A variety of Pyrochlore Supergroup

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]; consequently, by current standards, betafite is defined as a calcium-rich and Ti-dominant pyrochlore. This renders the name calciobetafite redundant, and has the added effect of bringing members of the betafite group in line with the other groups (furthermore, type calciobetafite is Nb-dominant, not Ti-dominant, and belongs to the pyrochlore group).

Classification of Calciobetafite (of Mazzi & Munno)

Discredited 2010
4.DH.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
H : With large (+- medium-sized) cations; sheets of edge-sharing octahedra
8.2.3.5

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
2 : A2B2O6(O,OH,F)
18.4.10

18 : Niobates and Tantalates
4 : Niobates and tantalates containing both U and rare earths
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Physical Properties of Calciobetafite (of Mazzi & Munno)

Hardness (Mohs):
4½ - 5½

Relationship of Calciobetafite (of Mazzi & Munno) to other Species

4.DH.05Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
4.DH.05OrthobranneriteU4+U6+Ti4O12(OH)2
4.DH.05Thorutite(Th,U,Ca)Ti2(O,OH)6
4.DH.10KassiteCaTi2O4(OH)2
4.DH.10Lucasite-(Ce)CeTi2(O,OH)6
4.DH.15Bariomicrolite (of Hogarth 1977)
4.DH.15Bariopyrochlore (of Hogarth 1977)
4.DH.15Betafite (of Hogarth 1977)
4.DH.15Bismutomicrolite (of Hogarth 1977)
4.DH.15Ceriopyrochlore (of Hogarth 1977)
4.DH.15Cesstibtantite
4.DH.15JixianitePb(W,Fe3+)2(O,OH)7
4.DH.15Hydropyrochlore(H2O,□)2Nb2(O,OH)6(H2O,K,Sr)
4.DH.15Natrobistantite
4.DH.15Plumbopyrochlore (of Skorobogatova et al.)
4.DH.15Plumbomicrolite (of Hogarth 1977)
4.DH.15Plumbobetafite (of Hogarth 1977)
4.DH.15Stibiomicrolite (of Groat et al.)
4.DH.15Strontiopyrochlore (of Hogarth 1977)
4.DH.15Stannomicrolite (of Hogarth 1977)
4.DH.15Stibiobetafite (of Černý et al.)
4.DH.15Uranpyrochlore (of Hogarth 1977)(U,Ca,Ce)2(Nb,Ta)2O6(OH,F)
4.DH.15Yttrobetafite (of Hogarth 1977)
4.DH.15Yttropyrochlore (of Hogarth 1977)
4.DH.15Fluornatromicrolite(Na1.5Bi0.5)Ta2O6F
4.DH.15Bismutopyrochlore (of Chukanov et al.)
4.DH.15Hydrokenoelsmoreite2W2O6(H2O)
4.DH.20BismutostibiconiteBi(Sb5+,Fe3+)2O7
4.DH.20BindheimitePb2Sb2O6O
4.DH.20Monimolite
4.DH.20CuproroméiteCu2Sb2(O,OH)7
4.DH.20StetefeldtiteAg2Sb2(O,OH)7
4.DH.20Stibiconite
4.DH.25RosiaitePbSb25+O6
4.DH.30ZirconoliteCaZrTi2O7
4.DH.35LiandratiteU(Nb,Ta)2O8
4.DH.35PetscheckiteUFe(Nb,Ta)2O8
4.DH.40IngersoniteCa3MnSb4O14
4.DH.45PittongiteNa0.22(W,Fe3+)(O,OH)3 · 0.44H2O
18.4.1Uranpyrochlore (of Hogarth 1977)(U,Ca,Ce)2(Nb,Ta)2O6(OH,F)
18.4.2Yttrocolumbite-(Y)Y(U4+,Fe2+)Nb2O8
18.4.3Yttrotantalite-(Y)(Y,Ca,U4+,Fe2+)2(Ta,Nb)2O8
18.4.4IshikawaiteU4+Fe2+Nb2O8
18.4.5Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ti,Ta)2O6
18.4.6Tanteuxenite-(Y)(Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6
18.4.7Kobeite-(Y)(Y,Zr)2(Ti,Fe3+)2(O,OH)7
18.4.8Polycrase-(Y)(Y,U)(Ti,Nb)2O6
18.4.9Yttropyrochlore (of Hogarth 1977)
18.4.11Yttrobetafite (of Hogarth 1977)
18.4.12Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8

Other Names for Calciobetafite (of Mazzi & Munno)

Name in Other Languages:

Other Information

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)

Reference List:
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.

Internet Links for Calciobetafite (of Mazzi & Munno)

Localities for Calciobetafite (of Mazzi & Munno)

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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 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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