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Petscheckite

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Håkonhals Quarry, Finnøy, Hamarøy, Nordland, Norway
© K.E.Larsen

Show Petscheckite Photos (6)



Formula:
UFe(Nb,Ta)
 
2
O
 
8
System:HexagonalColour:Black
Hardness:5
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.

Classification of Petscheckite

IMA status:Approved 1975
Strunz 8th edition ID:4/D.23-10
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:8.1.9.2

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
Hey's CIM Ref.:18.3.5

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

Type Locality:Antsakoa I pegmatite, Berere Pegmatite Field, Tsaratanàna District, Betsiboka Region, Mahajanga (Majunga) Province, Madagascar
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.
Year of Discovery:1972
Geological Setting of type material:A beryl-columbite subtype LCT granite pegmatite
Associated Minerals at type locality:
Liandratite

Physical Properties of Petscheckite

Diaphaneity (Transparency):Opaque
Colour:Black
Streak:Brownish black
Hardness (Mohs):5

Crystallography of Petscheckite

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

Chemical Properties of Petscheckite

Formula:
UFe(Nb,Ta)
 
2
O
 
8
Essential elements:Fe, Nb, O, U
All elements listed in formula:Fe, Nb, O, Ta, U

Relationship of Petscheckite 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.15Bariopyrochlore (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.20Oxyplumboroméite
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.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
18.3.2Uranmicrolite (of Hogarth 1977)
18.3.3Betafite (of Hogarth 1977)
18.3.4Plumbobetafite (of Hogarth 1977)
18.3.6Hydroxy-petscheckite
UFe
 
1/3
(Nb,Ta)
 
2
O
 
7
(O,OH)
18.3.7Oxy-petscheckite
UFe
 
2/3
(Nb,Ta)
 
2
O
 
8
18.3.8Ashanite
(Nb,Ta,U,Fe,Mn)
 
4
O
 
8

Other Names for Petscheckite

Synonyms:
IMA1975-038
Other Languages:
German:Petscheckit
Spanish:Petscheckita

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 Petscheckite

Reference List:

- +
- 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 Petscheckite

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    • Localities for Petscheckite

    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.
    Hide Locality List
    (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.
    Germany
     
    • Bavaria
      • Upper Palatinate
        • Oberpfälzer Wald
          • Vohenstrauß
            • 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
     
    • Mahajanga (Majunga) Province
      • 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.
    		Rocks & Min. (2007) 82:233
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