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Liandratite

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Formula:
U(Nb,Ta)2O8
Colour:
Yellow to yellow-brown
Hardness:
Crystal System:
Trigonal
Name:
For the French prospector, Georges Liandrat.
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Classification of LiandratiteHide

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
8.1.9.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
18.3.1

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

Physical Properties of LiandratiteHide

Transparency:
Translucent
Comment:
Described as glassy
Colour:
Yellow to yellow-brown
Streak:
Yellow-white
Hardness:
3½ on Mohs scale
Fracture:
Conchoidal

Chemical Properties of LiandratiteHide

Formula:
U(Nb,Ta)2O8
IMA Formula:
U6+Nb2O8

Crystallography of LiandratiteHide

Crystal System:
Trigonal
Cell Parameters:
a = 6.36 Å, c = 4.01 Å
Ratio:
a:c = 1 : 0.631
Unit Cell V:
140.47 ų (Calculated from Unit Cell)

Type Occurrence of LiandratiteHide

General Appearance of Type Material:
As a 2mm thick metamict crust surrounding petscheckite
Geological Setting of Type Material:
A beryl-columbite subtype LCT granite pegmatite
Associated Minerals at Type Locality:

Synonyms of LiandratiteHide

Other Language Names for LiandratiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Petscheckite6 photos of Liandratite associated with Petscheckite on mindat.org.
Fergusonite-(Y)1 photo of Liandratite associated with Fergusonite-(Y) 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.15Bariopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6ZIso. 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.35PetscheckiteUFe(Nb,Ta)2O8Hex.
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

8.1.9.2PetscheckiteUFe(Nb,Ta)2O8Hex.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

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
18.3.5PetscheckiteUFe(Nb,Ta)2O8Hex.
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 LiandratiteHide

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

Internet Links for LiandratiteHide

Localities for LiandratiteHide

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.
Australia
 
  • Western Australia
    • Upper Gascoyne Shire
      • Yinnietharra (Yinnietharra Station; Yinnetharra)
R Bottrill collection (unconfirmed)
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
 
  • Aust-Agder
    • Iveland
Selbekk R.S. (2010): Norges mineraler. En revidert utgave av Norges mineraler (Neumann 1985). Tapir-NGU-NHM. 552p (p.176)
  • Østfold
    • Halden
      • Idd
        • Aspedammen
Kristiansen, R. (2006): Mineralnytt. Nytt for Norge: Liandratitt, U 6+(Nb,Ta)2O8 fra Herrebøkasa, Østfold. STEIN 33(2): 28
  • Telemark
    • Tokke
      • Klauvreid
Larsen. A.O. & Åsheim, A. (2008): Klauvreid pegmatittbrudd, del 1: Geologi og mineralogi. Norsk Bergverksmuseum Skrift. 38, 49-56.
Sweden
 
  • Norrbotten
    • Luleå
      • Råneå
P.M. Kartashov data
USA
 
  • Colorado
    • Fremont Co.
      • Eight Mile Park Pegmatite District
Gunnar Farber
  • Connecticut
    • Middlesex Co.
      • Portland
Personal collection of Fred E Davis, and EDS analysis
  • Wisconsin
    • Marathon Co.
      • Wausau Intrusive Complex
        • Nine Mile Pluton
www.uwrf.edu/~wc01
Cordura, W http://www.uwex.edu/wgnhs/Mineral%20Index/Minerals/liandratite.htm
Mineral and/or Locality  
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