Mindat Logo

Bariopyrochlore (of Hogarth 1977)

This page is currently not sponsored. Click here to sponsor this page.



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

Classification of Bariopyrochlore (of Hogarth 1977)

IMA status:Discredited 2010
Strunz 8th edition ID:4/C.17-50
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:8.2.1.3

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
2 : A2B2O6(O,OH,F)
Hey's CIM Ref.:18.1.17

18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U
mindat.org URL:http://www.mindat.org/min-527.html
Please feel free to link to this page.

Type Occurrence of Bariopyrochlore (of Hogarth 1977)

Type Locality:Panda Hill, Mbeya, Mbeya Region, Tanzania
General Appearance of Type Material:Crude to anhedral crystals to 1 mm, granular, porous due to alteration or recrystallization
Geological Setting of type material:Contact zone of a highly weathered biotite-rich rock in a roof pendant in a carbonatite
Associated Minerals at type locality:
ZirconRutileQuartzLimoniteKaolinite
HematiteFluoriteChlorite GroupBiotiteApatite
Albite-Anorthite Series

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)

Lustre: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 (measured):3.85 - 4.15 g/cm3
Density (calculated):4.01 g/cm3

Crystallography of Bariopyrochlore (of Hogarth 1977)

Crystal System:Isometric
Class (H-M):m3m (4/m 3 2/m) - Hexoctahedral
Space Group:Fd3m {F41/d 3 2/m}
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
Maximum 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

Related Minerals - Nickel-Strunz Grouping):

- +
4.DH.05Brannerite
(U
4+
 
,REE,Th,Ca)(Ti,Fe
3+
 
,Nb)
 
2
(O,OH)
 
6
4.DH.05Orthobrannerite
U
4+
 
U
6+
 
Ti
 
4
O
 
12
(OH)
 
2
4.DH.05Thorutite
(Th,U,Ca)Ti
 
2
(O,OH)
 
6
4.DH.10Kassite
CaTi
 
2
O
 
4
(OH)
 
2
4.DH.10Lucasite-(Ce)
CeTi
 
2
(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.15Jixianite
Pb(W,Fe
3+
 
)
 
2
(O,OH)
 
7
4.DH.15Hydropyrochlore
(H
 
2
O,□)
 
2
Nb
 
2
(O,OH)
 
6
(H
 
2
O)
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)
 
2
O
 
6
(OH,F)
4.DH.15Yttrobetafite (of Hogarth 1977)
4.DH.15Yttropyrochlore (of Hogarth 1977)
4.DH.15Fluornatromicrolite
(Na,Ca,Bi)
 
2
Ta
 
2
O
 
6
F
4.DH.15Bismutopyrochlore (of Chukanov et al.)
4.DH.15Hydrokenoelsmoreite
 
2
W
 
2
O
 
6
(H
 
2
O)
4.DH.20Bismutostibiconite
Bi(Sb
5+
 
,Fe
3+
 
)
 
2
O
 
7
4.DH.20Bindheimite
Pb
 
2
Sb
 
2
O
 
6
O
4.DH.20Monimolite
4.DH.20Cuproroméite
Cu
 
2
Sb
 
2
(O,OH)
 
7
4.DH.20Stetefeldtite
Ag
 
2
Sb
 
2
(O,OH)
 
7
4.DH.20Stibiconite
4.DH.25Rosiaite
PbSb
5+
2
O
 
6
4.DH.30Zirconolite
CaZrTi
 
2
O
 
7
4.DH.35Liandratite
U(Nb,Ta)
 
2
O
 
8
4.DH.35Petscheckite
UFe(Nb,Ta)
 
2
O
 
8
4.DH.40Ingersonite
Ca
 
3
MnSb
 
4
O
 
14
4.DH.45Pittongite
Na
 
0.22
(W,Fe
3+
 
)(O,OH)
 
3
· 0.44H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
18.1.1Lithiotantite
Li(Ta,Nb)
 
3
O
 
8
18.1.2Lueshite
NaNbO
 
3
18.1.3Natroniobite
NaNbO
 
3
18.1.4Franconite
Na
 
2
Nb
 
4
O
 
11
· 9H
 
2
O
18.1.5Natrotantite
Na
 
2
Ta
 
4
O
 
11
18.1.6Irtyshite
Na
 
2
(Ta,Nb)
 
4
O
 
11
18.1.7Rankamaite
(Na,K)
 
3
(Ta,Nb,Al)
 
11
(O,OH)
 
31
18.1.8Hydropyrochlore
(H
 
2
O,□)
 
2
Nb
 
2
(O,OH)
 
6
(H
 
2
O)
18.1.9Calciotantite
CaTa
 
4
O
 
11
18.1.10Rynersonite
Ca(Ta,Nb)
 
2
O
 
6
18.1.11Microlite Group
18.1.12Belyankinite
Ca
 
1-2
(Ti,Nb)
 
5
O
 
12
· 9H
 
2
O (?)
18.1.13Latrappite
(Ca,Na)(Nb,Ti,Fe)O
 
3
18.1.14Hochelagaite
(Ca,Na,Sr)(Nb,Ti,Si,Al)
 
4
O
 
11
· 8H
 
2
O
18.1.15Bariomicrolite (of Hogarth 1977)
18.1.16Parabariomicrolite
BaTa
 
4
O
 
10
(OH)
 
2
· 2H
 
2
O
18.1.18Alumotantite
AlTaO
 
4
18.1.19Simpsonite
Al
 
4
(Ta,Nb)
 
3
O
 
13
(OH,F)
18.1.20Sosedkoite
(K,Na)
 
5
Al
 
2
(Ta,Nb)
 
22
O
 
60
18.1.21Thoreaulite
(Sn
2+
 
,Pb)(Ta,Nb)
 
2
O
 
6
18.1.22Stannomicrolite (of Hogarth 1977)
18.1.23Foordite
(Sn,Pb)(Nb,Ta)
 
2
O
 
6
18.1.24Changbaiite
PbNb
 
2
O
 
6
18.1.25Plumbopyrochlore (of Skorobogatova et al.)
18.1.26Plumbomicrolite (of Hogarth 1977)
18.1.27Stibiocolumbite
Sb(Nb,Ta)O
 
4
18.1.28Stibiotantalite
Sb(Ta,Nb)O
 
4
18.1.29Natrobistantite
18.1.30Cesplumtantite
(Cs,Na)
 
2
(Pb,Sb
3+
 
)
 
3
Ta
 
8
O
 
24
18.1.31Stibiomicrolite (of Groat et al.)
18.1.32Cesstibtantite
18.1.34Bismutotantalite
Bi(Ta,Nb)O
 
4
18.1.35Bismutomicrolite (of Hogarth 1977)
18.1.36Tantalite-(Mn)
MnTa
 
2
O
 
6
18.1.37Gerasimovskite
(Mn,Ca)(Nb,Ti)
 
5
O
 
12
· 9H
 
2
O
18.1.38Tapiolite-(Mn)
(Mn,Fe)(Ta,Nb)
 
2
O
 
6
18.1.39Columbite-(Mn)
(Mn,Fe)(Nb,Ta)
 
2
O
 
6
18.1.40Wodginite
Mn(Sn,Ta)Ta
 
2
O
 
8
18.1.41Ixiolite
(Ta,Nb,Sn,Fe,Mn)
 
4
O
 
8
18.1.42Columbite-(Fe)
FeNb
 
2
O
 
6
18.1.43Tantalite-(Fe)
FeTa
 
2
O
 
6
18.1.44Columbite
(Fe,Mn)(Nb,Ta)
 
2
O
 
6
18.1.45Tantalite
(Fe,Mn)(Ta,Nb)
 
2
O
 
6
18.1.46Tapiolite
(Fe,Mn)(Ta,Nb)
 
2
O
 
6
18.1.47Tapiolite-(Fe)
(Fe,Mn)(Ta,Nb)
 
2
O
 
6
18.1.48Columbite-(Mg)
(Mg,Fe,Mn)(Nb,Ta)
 
2
O
 
6
18.1.50Strüverite
(Ti,Ta,Fe)O
 
2
18.1.51 Staringite
(Fe,Mn)
 
x
(Ta,Nb)
 
2x
Sn
 
6-3x
O
 
12

Other Names for Bariopyrochlore (of Hogarth 1977)

Synonyms:
Pandaite
Other Languages:
German:Bariopyrochlor
Pandait
Russian:Бариопирохлор
Spanish:Pandaita

Other Information

Health Warning: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)

Search Engines:
  • Look for Bariopyrochlore (of Hogarth 1977) on Google
  • Look for Bariopyrochlore (of Hogarth 1977) images on Google
  • Mineral Dealers:
  • Rare and Unusual minerals at Mineralogical Research Company
  • Buy from David K Joyce minerals
  • Buy fine minerals and gemstones from Pala International
  • Top quality minerals from Kristalle of California
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • SpiriferMinerals.com - high quality low prices
  • Buy minerals from YourMineralCollection
  • Bariopyrochlore (of Hogarth 1977) specimens for sale - minfind.com
  • Fine Minerals from Weinrich Minerals, Inc.
  • rare and unusual minerals mainly crystallized
  • The Arkenstone - Fine Minerals
  • Buy RARE Minerals from Rocks of Africa
  • Jobs:
  • Mining & Geology Jobs
  • Localities for Bariopyrochlore (of Hogarth 1977)

    The 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. ? 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
     
    • Kitaa Province (West Greenland)
      • 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.
        • Stettin pluton
    Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 42
    Mineral and/or Locality  
    Search Google  
    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: January 6, 2014 01:55:35
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds