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Petscheckite

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Formula:
UFe(Nb,Ta)2O8
Colour:
Black
Hardness:
5
Crystal System:
Hexagonal
Name:
For Eckehard Petsch (1939-), of Idar-Oberstein, Germany, a prospector in Madagascar.
Due to the metamict and altered state of the type petscheckite, the mineral is not well-described. The type was altered into partially iron-leached and oxidized phases designated " oxy-petscheckite" and "hydroxy-petscheckite". Thus the original material was hypothesized on theoretical ground.


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Classification of PetscheckiteHide

Approved
Approval Year:
1975
4.DH.35

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
8.1.9.2

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
18.3.5

18 : Niobates and Tantalates
3 : Niobates and tantalates containing U but not rare earths

Physical Properties of PetscheckiteHide

Transparency:
Opaque
Colour:
Black
Streak:
Brownish black
Hardness:

Chemical Properties of PetscheckiteHide

Formula:
UFe(Nb,Ta)2O8
IMA Formula:
U4+Fe2+Nb2O8

Crystallography of PetscheckiteHide

Crystal System:
Hexagonal
Cell Parameters:
a = 6.42 Å, c = 4.02 Å
Ratio:
a:c = 1 : 0.626
Unit Cell V:
143.49 ų (Calculated from Unit Cell)

Type Occurrence of PetscheckiteHide

General Appearance of Type Material:
Metamict crystals up to 4 cm long and 2 cm thick with a greybrown, brown, yellow or white crust of varying thickness.
Geological Setting of Type Material:
A beryl-columbite subtype LCT granite pegmatite
Associated Minerals at Type Locality:

Synonyms of PetscheckiteHide

Other Language Names for PetscheckiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Liandratite6 photos of Petscheckite associated with Liandratite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.DH.05Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6Mon. 2/m : B2/m
4.DH.05OrthobranneriteU4+U6+Ti4O12(OH)2Orth.
4.DH.05Thorutite(Th,U,Ca)Ti2(O,OH)6Mon.
4.DH.10KassiteCaTi2O4(OH)2Orth.
4.DH.10Lucasite-(Ce)CeTi2(O,OH)6Mon.
4.DH.15Bariomicrolite (of Hogarth 1977)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Betafite (of Hogarth 1977)A2-mB2X6-wY1+wIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Bismutomicrolite (of Hogarth 1977)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Calciobetafite (of Mazzi & Munno)(Ca,Na)2(Nb,Ti)2(O,OH)7
4.DH.15Ceriopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
4.DH.15JixianitePb(W,Fe3+)2(O,OH)7Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Hydropyrochlore(H2O,□)2Nb2(O,OH)6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Natrobistantite
4.DH.15Plumbopyrochlore (of Skorobogatova et al.)A2Nb2(O,OH)6Z
4.DH.15Plumbomicrolite (of Hogarth 1977)
4.DH.15Plumbobetafite (of Hogarth 1977)A2-mB2X6-wY1-n
4.DH.15Stibiomicrolite (of Groat et al.)
4.DH.15Strontiopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
4.DH.15Stannomicrolite (of Hogarth 1977)
4.DH.15Stibiobetafite (of Černý et al.)A2-mB2X6-wY1-nIso.
4.DH.15Uranpyrochlore (of Hogarth 1977)(U,Ca,Ce)2(Nb,Ta)2O6(OH,F)Iso.
4.DH.15Yttrobetafite (of Hogarth 1977)A2-mB2X6-wY1-n
4.DH.15Yttropyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
4.DH.15Fluornatromicrolite(Na1.5Bi0.5)Ta2O6FIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Bismutopyrochlore (of Chukanov et al.)A2Nb2(O,OH)6ZAmor.
4.DH.15Hydrokenoelsmoreite2W2O6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.20BismutostibiconiteBi(Sb5+,Fe3+)2O7Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.20BindheimitePb2Sb2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.20MonimoliteIso. m3m (4/m 3 2/m)
4.DH.20CuproroméiteCu2Sb2(O,OH)7Iso.
4.DH.20StetefeldtiteAg2Sb2(O,OH)7Iso.
4.DH.20Stibiconite(Sb,O,OH) ?
4.DH.25RosiaitePbSb5+2O6Trig. 3m (3 2/m) : P3 1m
4.DH.30ZirconoliteCaZrTi2O7Orth.
4.DH.35LiandratiteU(Nb,Ta)2O8Trig.
4.DH.40IngersoniteCa3Mn2+Sb5+4O14Trig. 3 2 : P31 2 1
4.DH.45PittongiteNa0.22(W,Fe3+)(O,OH)3 · 0.44H2OHex. 6 m2 : P6m2

Related Minerals - Dana Grouping (8th Ed.)Hide

8.1.9.1LiandratiteU(Nb,Ta)2O8Trig.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

18.3.1LiandratiteU(Nb,Ta)2O8Trig.
18.3.2Uranmicrolite (of Hogarth 1977)Iso.
18.3.3Betafite (of Hogarth 1977)A2-mB2X6-wY1+wIso. m3m (4/m 3 2/m) : Fd3m
18.3.4Plumbobetafite (of Hogarth 1977)A2-mB2X6-wY1-n
18.3.6Hydroxy-petscheckiteUFe1/3(Nb,Ta)2O7(O,OH)
18.3.7Oxy-petscheckiteUFe2/3(Nb,Ta)2O8
18.3.8Ashanite(Nb,Ta,U,Fe,Mn)4O8Orth. mmm (2/m 2/m 2/m) : Pban

Other InformationHide

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 PetscheckiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
- Mücke, A. & Strunz, H. (1978): Petscheckite and liandratite, two new pegmatite minerals from Madagascar. American Mineralogist 63: 941-946
- Tomašić, N., Raade, G. & Bermanec, V. (2004): REE-bearing petscheckite from Tiltvika, Nordland, Norway, and its heating products. Neues Jahrbuch für Mineralogie Monatshefte 2004 (4) : 163-175

Internet Links for PetscheckiteHide

Localities for PetscheckiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Germany
 
  • Bavaria
    • Upper Palatinate
      • Waidhaus
        • Hagendorf
Mücke A., Keck, E. (2008): Untersuchungen an Columbiten und dem mit Columbit verwachsenen Neufund Petscheckit aus dem Pegmatit von Hagendorf-Süd/Oberpfalz, Der Aufschluss, Vol. 59, 373-392
Madagascar (TL)
 
  • Mahajanga Province (Majunga)
    • Betsiboka Region
      • Tsaratanàna District
        • Berere Pegmatite Field
Mücke, A. & Strunz, H. (1978): Petscheckite and liandratite, two new pegmatite minerals from Madagascar. American Mineralogist 63: 941-946
Norway
 
  • Nordland
    • Hamarøy
      • Finnøy
P.M. Kartashov data; Raade, G. & Williams, T. C. (2005): (Y+REE)-dominated analogues of petscheckite from the Tysfjord area, north Norway. GFF. 127: 39
      • Tiltvika
Tomašić, N., Raade, G. & Bermanec, V. (2004): REE-bearing petscheckite from Tiltvika, Nordland, Norway, and its heating products. Neues Jahrbuch für Mineralogie Monatshefte 2004 (4) : 163-175
USA
 
  • Connecticut
    • Middlesex Co.
      • Portland
Found by Fred Davis
  • Wisconsin
    • Marathon Co.
      • Wausau Intrusive Complex
        • Nine Mile pluton
Rocks & Min. (2007) 82:233
Mineral and/or Locality  
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