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Liandratite

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Formula:
U(Nb,Ta)
 
2
O
 
8
System:TrigonalColour:Yellow to yellow-brown
Hardness:
Name:For the French prospector, Georges Liandrat.
This page provides mineralogical data about Liandratite.

Classification of Liandratite

IMA status:Approved 1975
Strunz 8th edition ID:4/D.23-20
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:8.1.9.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
Hey's CIM Ref.:18.3.1

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

Type Locality:Antsakoa I pegmatite, Berere Pegmatite Field, Tsaratanàna District, Betsiboka Region, Mahajanga Province (Majunga), Madagascar
General Appearance of Type Material:As a 2mm thick metamict crust surrounding petscheckite
Year of Discovery:1972
Geological Setting of type material:A beryl-columbite subtype LCT granite pegmatite
Associated Minerals at type locality:
Petscheckite

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)
 
2
O
 
8
Simplified for copy/paste:U(Nb,Ta)2O8
Essential elements:Nb, O, U
All elements listed in formula:Nb, O, Ta, U

Relationship of Liandratite 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.20Bindheimite
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.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:

- +
18.3.2Uranmicrolite (of Hogarth 1977)
18.3.3Betafite (of Hogarth 1977)
18.3.4Plumbobetafite (of Hogarth 1977)
18.3.5Petscheckite
UFe(Nb,Ta)
 
2
O
 
8
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 Liandratite

Synonyms:
IMA1975-039Liandradite
Other Languages:
German:Liandradit
Liandratit
Spanish:Liandradita
Liandratita

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 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

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Liandratite details from Handbook of Mineralogy (PDF)
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  • Localities for Liandratite

    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.
    (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.
    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 pluton
          • "Rotten granite" quarries
    www.uwrf.edu/~wc01
    Cordura, W http://www.uwex.edu/wgnhs/Mineral%20Index/Minerals/liandratite.htm
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