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Liandratite

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Formula:
U(Nb,Ta)2O8
System:
Trigonal
Colour:
Yellow to yellow-brown
Hardness:
Name:
For the French prospector, Georges Liandrat.
This page provides mineralogical data about Liandratite.

Classification of Liandratite

Approved 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
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First Recorded Occurrence of Liandratite

General Appearance of First Recorded Material:
As a 2mm thick metamict crust surrounding petscheckite
Year of Discovery:
1972
Geological Setting of First Recorded Material:
A beryl-columbite subtype LCT granite pegmatite
Associated Minerals at First Recorded Locality:

Physical Properties of Liandratite

Diaphaneity (Transparency):
Translucent
Comment:
Described as glassy
Colour:
Yellow to yellow-brown
Streak:
Yellow-white
Hardness (Mohs):
Fracture:
Conchoidal

Crystallography of Liandratite

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

Chemical Properties of Liandratite

Formula:
U(Nb,Ta)2O8
Essential elements:
All elements listed in formula:

Relationship of Liandratite to other Species

4.DH.05Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
4.DH.05OrthobranneriteU4+U6+Ti4O12(OH)2
4.DH.05Thorutite(Th,U,Ca)Ti2(O,OH)6
4.DH.10KassiteCaTi2O4(OH)2
4.DH.10Lucasite-(Ce)CeTi2(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.15JixianitePb(W,Fe3+)2(O,OH)7
4.DH.15Hydropyrochlore(H2O,□)2Nb2(O,OH)6(H2O)
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)2O6(OH,F)
4.DH.15Yttrobetafite (of Hogarth 1977)
4.DH.15Yttropyrochlore (of Hogarth 1977)
4.DH.15Fluornatromicrolite(Na,Ca,Bi)2Ta2O6F
4.DH.15Bismutopyrochlore (of Chukanov et al.)
4.DH.15Hydrokenoelsmoreite2W2O6(H2O)
4.DH.20BismutostibiconiteBi(Sb5+,Fe3+)2O7
4.DH.20BindheimitePb2Sb2O6O
4.DH.20Monimolite
4.DH.20CuproroméiteCu2Sb2(O,OH)7
4.DH.20StetefeldtiteAg2Sb2(O,OH)7
4.DH.20Stibiconite
4.DH.25RosiaitePbSb25+O6
4.DH.30ZirconoliteCaZrTi2O7
4.DH.35PetscheckiteUFe(Nb,Ta)2O8
4.DH.40IngersoniteCa3MnSb4O14
4.DH.45PittongiteNa0.22(W,Fe3+)(O,OH)3 · 0.44H2O

Other Names for Liandratite

Name in Other Languages:

Other Information

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 Liandratite

Reference List:
Mücke, A. & Strunz, H. (1978): Petscheckite and liandratite, two new pegmatite minerals from Madagascar. American Mineralogist 63: 941-946

Internet Links for Liandratite

Localities for Liandratite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Australia
 
  • Western Australia
    • Upper Gascoyne Shire
      • Yinnietharra (Yinnietharra Station; Yinnetharra)
R Bottrill collection (unconfirmed)
Madagascar
 
  • 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
 
  • Østfold
    • Halden
      • Idd
        • Aspedammen
Kristiansen, R. (2006): Mineralnytt. Nytt for Norge: Liandratitt, U 6+(Nb,Ta)2O8 fra Herrebøkasa, Østfold. STEIN 33(3): 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
    • 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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