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Uranmicrolite

Big Photo

Alpe Rosso, Orcesco, Vigezzo Valley, Ossola Valley, Verbano-Cusio-Ossola Province, Piedmont, Italy
© O. Dziallas

Show Uranmicrolite Photos (12)
Formula:
(U,Ca,Ce)
 
2
(Ta,Nb)
 
2
O
 
6
(OH,F)
System:IsometricColour:Yellowish-brown, ...
Hardness:5½
Name:Named as a uranium-bearing variety of microlite.


Pyrochlore Group. Microlite Subgroup. The uranium analogue of the other members of the Microlite Subgroup and the tantalum analogue of Uranpyrochlore.

Classification of Uranmicrolite

IMA status:Approved
Strunz 8th edition ID:4/C.18-80
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:8.2.2.4

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
2 : A2B2O6(O,OH,F)
Hey's CIM Ref.:18.3.2

18 : Niobates and Tantalates
3 : Niobates and tantalates containing U but not rare earths
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Type Occurrence of Uranmicrolite

Type Locality:Posse Mine (Posse Farm), São José de Brejaúba (São José de Bryamba), Conceição do Mato Dentro, Minas Gerais, Southeast Region, Brazil
Year of Discovery:1957

Physical Properties of Uranmicrolite

Lustre:Waxy, Greasy
Colour:Yellowish-brown, greenish-brown, brownish-black
Streak:Yellow
Hardness (Mohs):5½

Crystallography of Uranmicrolite

Crystal System:Isometric

Optical Data of Uranmicrolite

Type:Isotropic

Chemical Properties of Uranmicrolite

Formula:
(U,Ca,Ce)
 
2
(Ta,Nb)
 
2
O
 
6
(OH,F)
Essential elements:H, O, Ta, U
All elements listed in formula:Ca, Ce, F, H, Nb, O, Ta, U

Relationship of Uranmicrolite to other Species

Related to:
  • Microlite Subgroup
  • Pyrochlore Group
    • Related Minerals - Nickel-Strunz Grouping):

    - +
    4.DH.05Brannerite
    (U
    4+
     
    		,Ca)(Ti,Fe
    3+
     
    		)
     
    2
    		O
     
    6
    4.DH.05Orthobrannerite
    UTi
     
    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.15Alumotungstite
    (W,Al)(O,OH)
     
    3
    4.DH.15Bariomicrolite
    Ba(Ta,Nb)
     
    2
    		(O,OH)
     
    7
    4.DH.15Bariopyrochlore
    (Ba,Sr)
     
    2
    		(Nb,Ti)
     
    2
    		(O,OH)
     
    7
    4.DH.15Betafite
    (Ca,U)
     
    2
    		(Ti,Nb)
     
    2
    		O
     
    6
    		(OH)
    4.DH.15Bismutomicrolite
    (Bi,Ca)(Ta,Nb)
     
    2
    		O
     
    6
    		(OH)
    4.DH.15Calciobetafite
    (Ca,RE,Th,U)
     
    2
    		(Nb,Ta,Ti)
     
    2
    		O
     
    7
    4.DH.15Ceriopyrochlore-(Ce)
    (Ce,Ca,Y)
     
    2
    		(Nb,Ta)
     
    2
    		O
     
    6
    		(OH,F)
    4.DH.15Cesstibtantite
    (Cs,Na)SbTa
     
    4
    		O
     
    12
    4.DH.15Ferritungstite
    (W,Fe
    3+
     
    		)(O,OH)
     
    3
    4.DH.15Jixianite
    Pb(W,Fe
    3+
     
    		)
     
    2
    		(O,OH)
     
    7
    4.DH.15Kalipyrochlore
    (K,Sr)
     
    2-x
    		Nb
     
    2
    		O
     
    6
    		(O,OH)·nH
     
    2
    		O
    4.DH.15Microlite
    (Ca,Na)
     
    2
    		Ta
     
    2
    		O
     
    6
    		(O,OH,F)
    4.DH.15Natrobistantite
    (Na,Cs)Bi(Ta,Nb,Sb)
     
    4
    		O
     
    12
    4.DH.15Plumbopyrochlore
    (Pb,Y,U,Ca)
     
    2-x
    		Nb
     
    2
    		O
     
    6
    		(OH)
    4.DH.15Plumbomicrolite
    (Pb,Ca,U)
     
    2
    		Ta
     
    2
    		O
     
    6
    		(OH)
    4.DH.15Plumbobetafite
    (Pb,U,Ca)(Ti,Nb)
     
    2
    		O
     
    6
    		(OH,F)
    4.DH.15Pyrochlore
    (Ca,Na)
     
    2
    		Nb
     
    2
    		O
     
    6
    		(OH,F)
    4.DH.15Stibiomicrolite
    (Sb,Ca,Na)
     
    2
    		(Ta,Nb)
     
    2
    		O
     
    7
    4.DH.15Strontiopyrochlore
    (Sr,Ce,Ca)
     
    0.66
    		(Nb,Fe)
     
    2
    		(O,OH)
     
    7
    4.DH.15Stannomicrolite
    (Sn,Fe,Mn)
     
    2
    		(Ta,Nb,Sn)
     
    2
    		(O,OH)
     
    7
    4.DH.15Stibiobetafite
    (Sb,Ca)
     
    2
    		(Ti,Nb,Ta)
     
    2
    		(O,OH)
     
    7
    4.DH.15Uranpyrochlore
    (U,Ca,Ce)
     
    2
    		(Nb,Ta)
     
    2
    		O
     
    6
    		(OH,F)
    4.DH.15Yttrobetafite-(Y)
    (Y,U,Ce)
     
    2
    		(Ti,Nb,Ta)
     
    2
    		O
     
    6
    		OH
    4.DH.15Yttropyrochlore-(Y)
    (Y,Ca,U)
     
    1-2
    		(Nb,Ta,Ti)
     
    2
    		(O,OH)
     
    7
    4.DH.15Fluornatromicrolite
    (Na,Ca,Bi)
     
    2
    		Ta
     
    2
    		O
     
    6
    		F
    4.DH.15Bismutopyrochlore
    (Bi,U,Ca,Pb)
     
    1+x
    		(Nb,Ta)
     
    2
    		O
     
    6
    		(OH)·nH
     
    2
    		O
    4.DH.15Thorian Pyrochlore
    4.DH.15Elsmoreite
    WO
     
    3
    		·0.5H
     
    2
    		O
    4.DH.20Bismutostibiconite
    Bi(Sb
    5+
     
    		,Fe
    3+
     
    		)
     
    2
    		O
     
    7
    4.DH.20Bindheimite
    Pb
     
    2
    		Sb
     
    2
    		O
     
    6
    		(O,OH)
    4.DH.20Monimolite
    (Pb,Ca,Fe)
     
    3
    		Sb
     
    2
    		O
     
    7
    4.DH.20Partzite
    Cu
     
    2
    		Sb
     
    2
    		(O,OH)
     
    7
    4.DH.20Roméite
    (Ca,Fe,Mn,Na)
     
    2
    		(Sb,Ti)
     
    2
    		O
     
    6
    		(O,OH,F)
    4.DH.20Stetefeldtite
    Ag
     
    2
    		Sb
     
    2
    		(O,OH)
     
    7
    4.DH.20Stibiconite
    SbSb
     
    2
    		O
     
    6
    		(OH)
    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:

    - +
    18.3.1Liandratite
    U(Nb,Ta)
     
    2
    		O
     
    8
    18.3.3Betafite
    (Ca,U)
     
    2
    		(Ti,Nb)
     
    2
    		O
     
    6
    		(OH)
    18.3.4Plumbobetafite
    (Pb,U,Ca)(Ti,Nb)
     
    2
    		O
     
    6
    		(OH,F)
    18.3.5Petscheckite
    UFe(Nb,Ta)
     
    2
    		O
     
    8
    18.3.6 Hydroxyl-petscheckite
    UFe
     
    1/3
    		(Nb,Ta)
     
    2
    		O
     
    7
    		(O,OH)
    18.3.7 Oxy-petscheckite
    UFe
     
    2/3
    		(Nb,Ta)
     
    2
    		O
     
    8
    18.3.8Ashanite
    (Nb,Ta,U,Fe,Mn)
     
    4
    		O
     
    8

    Other Names for Uranmicrolite

    Synonyms:
    DjalmaiteTantalohatchettolite
    Other Languages:
    German:Tantalohatchettolit
    Uranmicrolith
    Uranmikrolith
    Spanish:Tantalohatchettolita
    Uranmicrolita

    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 Uranmicrolite

    Reference List:Annales Acad. Brasil. Ciencias (1939), 11, 347.

    American Mineralogist (1977): 62: 403-410.

    Articles/Blogs about Uranmicrolite

    Internet Links for Uranmicrolite

    Search Engines:
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  • Look for Uranmicrolite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Uranmicrolite in the Natural History Museum (London) online catalogue
  • Uranmicrolite details from Handbook of Mineralogy (PDF)
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    Localities for Uranmicrolite

    Hide Locality List
    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.
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    (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.
    Argentina
     
    • Salta
      • Nevados de Palermo
        • El Quemado District
    		Galliski et al. (2001) Bismutotantalite from northwestern Argentina: description and crystal structure. Can. Min. Vol. 39, pp. 103-110.
    Australia
     
    • South Australia
      • Flinders Ranges
        • North Flinders Ranges
          • Mt Babbage area (Inlier)
    		PA Wulser collection
    Austria
     
    • Carinthia
      • Millstatt lake ridge
        • Spittal
          • Wolfsberg Mt.
    		G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    Bolivia
     
    • Santa Cruz Department
      • Ñuflo de Chavez Province
        • San Agustín
    		Alfredo Petrov collection
    Brazil
     
    • Northeast Region
      • Rio Grande do Norte
        • Borborema mineral province
          • Parelhas
    		Beurlen, H., Da Silva, M.R.R., Thomas, R., Soares, D.R., and Olivier, P. (2008): Mineralium Deposita 43, 207-228.
    [MinRec 29:196]
    Beurlen, H., Da Silva, M.R.R., Thomas, R., Soares, D.R., and Olivier, P. (2008): Mineralium Deposita 43, 207-228.
    • Southeast Region
      • Minas Gerais
        • Conceição do Mato Dentro
          • São José de Brejaúba (São José de Bryamba)
    		No reference listed
    Canada
     
    • Ontario
      • Kenora District
        • Separation Rapids
    		Tindle, A.G. & F.W.Breaks: "Oxide minerals of the Separation Rapids rare-element granitic pegmatite group, northwestern Ontario": Can. Min. 36: 609-635(1998)
    China
     
    • Xinjiang (Xinjiang-Uygur) Autonomous Region
      • Yili Hasake (Ili Kazakh) Autonomous Prefecture
        • Aletai (Altay) Prefecture
          • Fuyun Co.
            • Koktokay (Keketuohai) Pegmatite field
              • Altay Mine
    		Zhang et al. 2004, Min. Mag. Vol 68, pp. 739-756.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Karlovy Vary Region
        • Lázně Kynžvart
    		Černý, P., Veselovský, F.: Pegmatit Bílý kámen (Weisser Stein) u Kynžvartu. Minerál, 2000, roč. 8, č. 1, s. 10-16.
    • Moravia (Mähren; Maehren)
      • Moravia-Silesia Region
        • Bruntál
          • Praded (Altvater)
    		Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
      • Olomouc Region
        • Šumperk (Mährisch Schönberg)
          • Maršíkov
    		No reference listed
    Novák, M., Černý, P.: Přehled minerálů niobu a tantalu z granitických pegmatitů České republiky. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1999, roč. 7, s. 117-131.; Novák, M.: Maršíkov - Scheibengraben. In Exkurzní průvodce po mineralogických lokalitách na Sobotínsku. Univerzita Palackého v Olomouci, 2002, Olomouc, s. 38-41.
    Finland
     
    • Etelä-Suomen Lääni
      • Orivesi
        • Eräjärvi area
    Italy
     
    • Lombardy
      • Sondrio Province
        • Chiavenna
          • Val San Giacomo
    		AA. VV., 1996. Collezionare minerali. Hobby & Work.
    • Piedmont
      • Verbano-Cusio-Ossola Province
        • Ossola Valley
          • Domodossola
            • Cosasca
    		Boscardin, M.; Mattioli, G. & Pierini, C. (1982): Mikrolith und Columbite. LAPIS 7 (3), 17-19
          • Vigezzo Valley
            • Craveggia
    		AA. VV., 1996. Collezionare minerali. Hobby & Work.
            • Orcesco
    		AA. VV., 1996. Collezionare minerali. Hobby & Work.
            • Trontano
    		Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): MInerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
    • Tuscany
      • Livorno Province
        • Elba Island
          • Campo nell'Elba
    		Orlandi et al., 1990. Nb-Ta oxides from Elba Island pegmatites. Atti Soc. Tosc. Sci. Nat., Mem., Serie A, 97: 161-173
    P. Orlandi, M. Pasero, N. Perchiazzi (1990) - Nb-Ta oxides from Elba Island pegmatites. - Atti Soc. Tosc. Sc. Nat., Mem. serie A, v.97: 161-173.
    Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo, 249 pp.
    Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo, 249 pp.
    Japan
     
    • Honshu Island
      • Kanto Region
        • Ibaraki Prefecture
          • Hitachiohta City
    		Matsubara et al (1995) Mineralogical Journal, 17, 338-345
    Madagascar
     
    • Antananarivo Province
      • Vakinankaratra Region (Betafo - Antsirabé region)
        • Sahatany Pegmatite Field (Mt Bity (Ibity) area)
          • Manandona Valley
    		Extra Lapis nr 17. Madagascar p 54 (german edition)
    Mozambique
     
    • Zambezia Province
      • Alto Ligonha District
    		No reference listed
    Min. Rec. Vol. 31, p. 489.
    Russia
     
    • Urals Region
      • Central Urals
        • Rezh District
          • Lipovka pegmatite field
    		Lapis 28(10), 60 (2003)
    Slovakia
     
    • Banská Bystrica Region
      • Southern Low Tatra Mts
        • Brusno
    		Uher, P. ,Černý, P., 1998 : Vzácnoprvková mineralizácia v granitových pegmatitoch Nízkych Tatier. Mineralia Slovaca, 30, 2,93 – 94
    • Bratislava Region
      • Malé Karpaty Mts
    		Uher P., Žitňan P., Ozdáín D., 2006: Compositional variations of pegmatite Nb-Ta mineral assemblage from the Limbach area, Malé karpaty Mts., Slovakia. Acta Miner.-Petrograph.,Abstract Series 5, Szeged, p.125
    Uher P., Žitňan P., Ozdín D., 2007: Pegmatitic Nb-Ta oxide minerals in alluvial placers from Limbach, Bratislava Massif, Western Carpathians, Slovakia: compositional variations and evolutionary trend. Journal of Geosciences, 52, 1-2, 133-141.
    • Košice Region
      • Eastern Slovenské Rudohorie Mts
    		Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
    South Africa
     
    • KwaZulu-Natal Province
    		Minerals of South Africa
    Sweden
     
    • Södermanland
      • Haninge
    USA
     
    • California
    		San Diego Natural History Museum
        • Mesa Grande District
    		Fisher, J., E. E. Foord, and G. A. Bricker, 1999. The geology, mineralogy, and history of the Himalaya mine, Mesa Grande, San Diego County, California. California Geology 52(1):3-18.
    • Connecticut
      • Hartford Co.
        • South Glastonbury
      • Litchfield Co.
        • Watertown
          • Rt. 7
    		Bill Barret Coll. Specimen, Minerals identified by Jeremy Zolan
      • Middlesex Co.
        • East Hampton
    • North Carolina
      • Mitchell Co.
        • Spruce Pine District
          • Spruce Pine
            • Greasy Creek Township
    • Wisconsin
      • Jefferson Co.
        • Waterloo
    		Buchholz, T.W., Falster, A.U., and Simmons, WmB. (2007) 34th Rochester Mineralogical Symposium, Contributed Papers.
    Mineral and/or Locality
    Google
     
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