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Bariopyrochlore (of Hogarth 1977)

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System:
Isometric
Colour:
Yellowish grey, light ...
Hardness:
4½ - 5
A variety of Pyrochlore Group

Classification of Bariopyrochlore (of Hogarth 1977)

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
8.2.1.3

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
2 : A2B2O6(O,OH,F)
18.1.17

18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U
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First Recorded Occurrence of Bariopyrochlore (of Hogarth 1977)

General Appearance of First Recorded Material:
Crude to anhedral crystals to 1 mm, granular, porous due to alteration or recrystallization
Geological Setting of First Recorded Material:
Contact zone of a highly weathered biotite-rich rock in a roof pendant in a carbonatite

Occurrences of Bariopyrochlore (of Hogarth 1977)

Geological Setting:
In weathered carbonatites; in an alkalic aegirine-albite-microcline metasomatite in nepheline syenite

Physical Properties of Bariopyrochlore (of Hogarth 1977)

Vitreous, Resinous
Diaphaneity (Transparency):
Translucent, Opaque
Colour:
Yellowish grey, light olive grey to very pale orange; white with many fine, colourless inclusions
Streak:
White
Hardness (Mohs):
4½ - 5
Hardness (Vickers):
VHN100=550 kg/mm2
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
very poor on {111}
Fracture:
Conchoidal
Density:
3.85 - 4.15 g/cm3 (Measured)    4.01 g/cm3 (Calculated)

Crystallography of Bariopyrochlore (of Hogarth 1977)

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
Cell Parameters:
a = 10.562Å
Unit Cell Volume:
V 1,178.25 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Crystals show cube and octahedron faces

Optical Data of Bariopyrochlore (of Hogarth 1977)

Type:
Isotropic
RI values:
n = 2.07 - 2.11
Max Birefringence:
δ = 0.000 - Isotropic minerals have no birefringence
Surface Relief:
Very High
Internal Reflections:
Colourless to white, occasionally brownish to reddish

Relationship of Bariopyrochlore (of Hogarth 1977) 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.15Betafite (of Hogarth 1977)
4.DH.15Bismutomicrolite (of Hogarth 1977)
4.DH.15Calciobetafite (of Mazzi & Munno)
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)
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(Na,Ca,Bi)2Ta2O6F
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
18.1.1LithiotantiteLi(Ta,Nb)3O8
18.1.2LueshiteNaNbO3
18.1.3NatroniobiteNaNbO3
18.1.4FranconiteNa2Nb4O11 · 9H2O
18.1.5NatrotantiteNa2Ta4O11
18.1.6IrtyshiteNa2(Ta,Nb)4O11
18.1.7Rankamaite(Na,K)3(Ta,Nb,Al)11(O,OH)31
18.1.8Hydropyrochlore(H2O,□)2Nb2(O,OH)6(H2O)
18.1.9CalciotantiteCaTa4O11
18.1.10RynersoniteCa(Ta,Nb)2O6
18.1.11Microlite Group
18.1.12BelyankiniteCa1-2(Ti,Nb)5O12 · 9H2O (?)
18.1.13Latrappite(Ca,Na)(Nb,Ti,Fe)O3
18.1.14Hochelagaite(Ca,Na,Sr)(Nb,Ti,Si,Al)4O11 · 8H2O
18.1.15Bariomicrolite (of Hogarth 1977)
18.1.16ParabariomicroliteBaTa4O10(OH)2 · 2H2O
18.1.18AlumotantiteAlTaO4
18.1.19SimpsoniteAl4(Ta,Nb)3O13(OH,F)
18.1.20Sosedkoite(K,Na)5Al2(Ta,Nb)22O60
18.1.21Thoreaulite(Sn2+,Pb)(Ta,Nb)2O6
18.1.22Stannomicrolite (of Hogarth 1977)
18.1.23Foordite(Sn,Pb)(Nb,Ta)2O6
18.1.24ChangbaiitePbNb2O6
18.1.25Plumbopyrochlore (of Skorobogatova et al.)
18.1.26Plumbomicrolite (of Hogarth 1977)
18.1.27StibiocolumbiteSb(Nb,Ta)O4
18.1.28StibiotantaliteSb(Ta,Nb)O4
18.1.29Natrobistantite
18.1.30Cesplumtantite(Cs,Na)2(Pb,Sb3+)3Ta8O24
18.1.31Stibiomicrolite (of Groat et al.)
18.1.32Cesstibtantite
18.1.34BismutotantaliteBi(Ta,Nb)O4
18.1.35Bismutomicrolite (of Hogarth 1977)
18.1.36Tantalite-(Mn)MnTa2O6
18.1.37Gerasimovskite(Mn,Ca)(Nb,Ti)5O12 · 9H2O
18.1.38Tapiolite-(Mn)(Mn,Fe)(Ta,Nb)2O6
18.1.39Columbite-(Mn)(Mn,Fe)(Nb,Ta)2O6
18.1.40WodginiteMn(Sn,Ta)Ta2O8
18.1.41Ixiolite(Ta,Nb,Sn,Fe,Mn)4O8
18.1.42Columbite-(Fe)FeNb2O6
18.1.43Tantalite-(Fe)FeTa2O6
18.1.44Columbite(Fe,Mn)(Nb,Ta)2O6
18.1.45Tantalite(Fe,Mn)(Ta,Nb)2O6
18.1.46Tapiolite(Fe,Mn)(Ta,Nb)2O6
18.1.47Tapiolite-(Fe)(Fe,Mn)(Ta,Nb)2O6
18.1.48Columbite-(Mg)(Mg,Fe,Mn)(Nb,Ta)2O6
18.1.50Strüverite(Ti,Ta,Fe)O2
18.1.51 Staringite(Fe,Mn)x(Ta,Nb)2xSn6-3xO12

Other Names for Bariopyrochlore (of Hogarth 1977)

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 Bariopyrochlore (of Hogarth 1977)

Reference List:
Jäger, E., Niggli, E. and van der Veen, A. H. (1959): A hydrated barium-strontium pyrochlore in a biotite rock from Panda Hill, Tanganyika. Mineralogical Magazine 32, 10-25. - American Mineralogist (1959), 44, 1324 (abstract).

Harris, P. M. (1965): Pandaite [= bariopyrochlore] from the Mrima Hill niobium deposit (Kenya). Mineralogical Magazine 35, 277-290.

Hogarth, D. D. (1977): Classification and nomenclature of the pyrochlore group. American Mineralogist 62, 403-410, esp. 407.

Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 42

Internet Links for Bariopyrochlore (of Hogarth 1977)

Localities for Bariopyrochlore (of Hogarth 1977)

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.
Brazil
 
  • Goiás
Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.
  • Minas Gerais
    • Araxá
Orris, G.J., and Grauch, R.I. (2002): USGS Open-File Report 02-189.; Traversa, G., Gomes, C. B., Brotzu, P., Buraglini, N., Morbidelli, L., Principato, M. S., ... & Ruberti, E. (2001). Petrography and mineral chemistry of carbonatites and mica-rich rocks from the Araxá complex (Alto Paranaíba Province, Brazil). Anais da Academia Brasileira de Ciências, 73(1), 71-98.
    • Tapira
Berger, V.I., Singer, D.A., and Orris, G.J. (2009): USGS Open-File Report 09-1139
Democratic Republic of Congo (Zaïre)
 
  • Kivu
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 42; Mineral. Deposita (Berl.) 6, 153-155 (1971)
Greenland
 
  • Qeqqata
    • Maniitsoq (Sukkertoppen)
Petersen, O. V. and Secher, K. (1993): The minerals of Greenland, The Mineralogical Record, Vol. 24(2), 1-65
Kenya
 
  • Coast Province
Harris, P. M. (1965): Pandaite [= bariopyrochlore] from the Mrima Hill niobium deposit (Kenya). Mineralogical Magazine 35, 277-290
Russia
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Khibiny Massif
Sorokhtina, N.V., Chukanov, N.V., Voloshin, A.V., Pakhomovsky, Y.A., Bogdanova, A.N., and Moiseev, M.M. (2008): Geology of Ore Deposits 50(7), 620-628.
      • Northern Karelia
www.koeln.netsurf.de/~w.steffens/vuori.htm
Tanzania
 
  • Mbeya Region
    • Mbeya
Min. Mag. 32, 10-25
USA
 
  • Wisconsin
    • Marathon Co.
      • Wausau Intrusive Complex
        • Stettin pluton
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 42
Mineral and/or Locality  
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