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Stannomicrolite

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Urucum Mine (Tim Mine; Tim claim; Córrego do Urucum pegmatite), Galiléia, Doce valley, Minas Gerais, Southeast Region, Brazil
© 2008, J. Weissman

Formula:
(Sn,Fe,Mn)
 
2
(Ta,Nb,Sn)
 
2
(O,OH)
 
7
Colour:Yellow-brown intergrowthsHardness:4½ - 5½
Name:In allusion to its tin (Latin "STANNum") content and relationship to microlite.


Pyrochlore Group. Microlite Subgroup. The tin analogue of the other members of the Microlite Subgroup.

Classification of Stannomicrolite

IMA status:Approved
Strunz 8th edition ID:4/C.18-20
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:8.2.2.6

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
2 : A2B2O6(O,OH,F)
Hey's CIM Ref.:18.1.22

18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U
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Type Occurrence of Stannomicrolite

Type Locality:Sukula, Tammela, Etelä-Suomen Lääni, Finland
Year of Discovery:1977

Physical Properties of Stannomicrolite

Colour:Yellow-brown intergrowths
Hardness (Mohs):4½ - 5½

Chemical Properties of Stannomicrolite

Formula:
(Sn,Fe,Mn)
 
2
(Ta,Nb,Sn)
 
2
(O,OH)
 
7
Essential elements:O, Sn, Ta
All elements listed in formula:Fe, H, Mn, Nb, O, Sn, Ta

Relationship of Stannomicrolite 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.15Stibiobetafite
    (Sb,Ca)
     
    2
    		(Ti,Nb,Ta)
     
    2
    		(O,OH)
     
    7
    4.DH.15Uranmicrolite
    (U,Ca,Ce)
     
    2
    		(Ta,Nb)
     
    2
    		O
     
    6
    		(OH,F)
    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,Na,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:
    18.1.1Lithiotantite
    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,Pb,Li)
     
    3
    		(Ta,Nb,Al)
     
    11
    		(O,OH)
     
    30
    18.1.8Kalipyrochlore
    (K,Sr)
     
    2-x
    		Nb
     
    2
    		O
     
    6
    		(O,OH)·nH
     
    2
    		O
    18.1.9Calciotantite
    CaTa
     
    4
    		O
     
    11
    18.1.10Rynersonite
    Ca(Ta,Nb)
     
    2
    		O
     
    6
    18.1.11Microlite
    (Ca,Na)
     
    2
    		Ta
     
    2
    		O
     
    6
    		(O,OH,F)
    18.1.12Belyankinite
    Ca
     
    1-2
    		(Ti,Zr,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
    Ba(Ta,Nb)
     
    2
    		(O,OH)
     
    7
    18.1.16Parabariomicrolite
    BaTa
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·2H
     
    2
    		O
    18.1.17Bariopyrochlore
    (Ba,Sr)
     
    2
    		(Nb,Ti)
     
    2
    		(O,OH)
     
    7
    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
    SnTa
     
    2
    		O
     
    6
    18.1.23Foordite
    (Sn,Pb)(Nb,Ta)
     
    2
    		O
     
    6
    18.1.24Changbaiite
    PbNb
     
    2
    		O
     
    6
    18.1.25Plumbopyrochlore
    (Pb,Y,U,Ca)
     
    2-x
    		Nb
     
    2
    		O
     
    6
    		(OH)
    18.1.26Plumbomicrolite
    (Pb,Ca,U)
     
    2
    		Ta
     
    2
    		O
     
    6
    		(OH)
    18.1.27Stibiocolumbite
    Sb(Nb,Ta)O
     
    4
    18.1.28Stibiotantalite
    Sb(Ta,Nb)O
     
    4
    18.1.29Natrobistantite
    (Na,Cs)Bi(Ta,Nb,Sb)
     
    4
    		O
     
    12
    18.1.30Cesplumtantite
    (Cs,Na)
     
    2
    		(Pb,Sb
    3+
     
    		)
     
    3
    		Ta
     
    8
    		O
     
    24
    18.1.31Stibiomicrolite
    (Sb,Ca,Na)
     
    2
    		(Ta,Nb)
     
    2
    		O
     
    7
    18.1.32Cesstibtantite
    (Cs,Na)SbTa
     
    4
    		O
     
    12
    18.1.33 Stibobetafite
    (Ca,Sb)
     
    2
    		(Ti,Nb,Ta)
     
    2
    		(O,OH)
     
    7
    18.1.34Bismutotantalite
    Bi(Ta,Nb)O
     
    4
    18.1.35Bismutomicrolite
    (Bi,Ca)(Ta,Nb)
     
    2
    		O
     
    6
    		(OH)
    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 Stannomicrolite

    Synonyms:
    Sukulaite
    German names:
    StannomicrolitStannomikrolith
    Russian names:
    Станномикролит
    Spanish names:
    Stannomicrolita

    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 Stannomicrolite

    Reference List:Vorma, A. & Siivola, J. (1967) Sukulaite - Ta2Sn2O7 - and wodginite as inclusions in cassiterite in the granite pegmatite in Sukula, Tammela in SW Finland. Comp. Rend. Soc. Geol. Finlande, 39, 173-187.

    American Mineralogist (1968): 53: 2103.

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

    Ercit, T.S.; Cerny, P.; Siivola, J. (1987) The composition of stannomicrolite. Neues Jahrbuch für Mineralogie, Monatshefte 1987 (6), 249-252.

    Internet Links for Stannomicrolite

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    Localities for Stannomicrolite

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    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.
    Brazil
     
    • Southeast Region
      • Minas Gerais
        • Doce valley
          • Galiléia
    		Excalibur Mineral Co.; www.mineralatlas.com.
    Finland
     
    • Etelä-Suomen Lääni
      • Tammela
    		Vorma,A. & Siivola, J. (1967) Sukulaite - Ta2Sn2O7 - and wodginite as inclusions in cassiterite in the granite pegmatite in Sukula, Tammela in SW Finland. Comp. Rend. Soc. Geol. Finlande, 39, 173-187; American Mineralogist (1977): 62: 407.
    Sweden
     
    • Västerbotten
      • Skellefteå
    		No reference listed
    Mineral and/or Locality
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