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Fergusonite-(Nd)

Big Photo

Biraya Fe-REE ore occurrence, Biraya and Bya Rivers confluence area (Chara Basin), Vitim Plateau, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia
© P.M. Kartashov

Formula:
(Nd,Ce)(Nb,Ti)O
 
4
Hardness:5½ - 6½
Name:After Robert Ferguson (1799-1865), Scottish physician.


Originally described from Bayan Obo (Bayun-Obo; Baiyunebo) deposit, Bayan Obo, Darhan Muminggan United Banner, Baotou League, Nei Mongol Autonomous Region (Inner Mongolia), China.

Classification of Fergusonite-(Nd)

IMA status:Published without Approval 1989
Strunz 8th edition ID:4/D.24-60
Nickel-Strunz 10th (pending) edition ID:7.GA.05

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
G : Molybdates, Wolframates and Niobates
A : Without additional anions or H2O
Dana 8th edition ID:8.1.1.4

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
Hey's CIM Ref.:18.2.5

18 : Niobates and Tantalates
2 : Niobates and tantalates containing rare earths but not U
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Physical Properties of Fergusonite-(Nd)

Hardness (Mohs):5½ - 6½

Optical Data of Fergusonite-(Nd)

Type:Uniaxial (-)
RI values: nω = 2.300 nε = 2.200
Maximum Birefringence:δ = 0.100

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High

Chemical Properties of Fergusonite-(Nd)

Formula:
(Nd,Ce)(Nb,Ti)O
 
4
Essential elements:Nb, Nd, O
All elements listed in formula:Ce, Nb, Nd, O, Ti

Relationship of Fergusonite-(Nd) to other Species

Related Minerals - Nickel-Strunz Grouping):
7.GA.05Fergusonite-(Ce)
(Ce,La,Nd)NbO
 
4
7.GA.05Fergusonite-(Y)
YNbO
 
4
7.GA.05Formanite-(Y)
YTaO
 
4
7.GA.05Powellite
Ca[MoO
 
4
]
7.GA.05Scheelite
Ca[WO
 
4
]
7.GA.05Stolzite
Pb[WO
 
4
]
7.GA.05Wulfenite
Pb[MoO
 
4
]
7.GA.10Paraniite-(Y)
Ca
 
2
Y(AsO
 
4
)(WO
 
4
)
 
2
Related Minerals - Hey's Index Grouping:
18.2.1Fergusonite-(Y)
YNbO
 
4
18.2.2β-Fergusonite-(Y)
YNbO
 
4
18.2.3Fergusonite-(Ce)
(Ce,La,Nd)NbO
 
4
18.2.4β-Fergusonite-(Ce)
(Ce,La,Nd)NbO
 
4
18.2.6β-Fergusonite-(Nd)
(Nd,Ce)NbO
 
4
18.2.7Formanite-(Y)
YTaO
 
4
18.2.8Pyrochlore
(Ca,Na)
 
2
Nb
 
2
O
 
6
(OH,F)
18.2.9Ceriopyrochlore-(Ce)
(Ce,Ca,Y)
 
2
(Nb,Ta)
 
2
O
 
6
(OH,F)
18.2.10Strontiopyrochlore
(Sr,Ce,Ca)
 
0.66
(Nb,Fe)
 
2
(O,OH)
 
7
18.2.11Loparite-(Ce)
(Na,Ce,Ca,Sr,Th)(Ti,Nb,Fe)O
 
3
18.2.12Fersmite
(Ca,Ce,Na)(Nb,Ta,Ti)
 
2
(O,OH,F)
 
6
18.2.13Aeschynite-(Ce)
(Ce,Ca,Fe,Th)(Ti,Nb)
 
2
(O,OH)
 
6
18.2.14Aeschynite-(Nd)
(Nd,Ce,Ca)(Ti,Nb)
 
2
(O,OH)
 
6
18.2.15Aeschynite-(Y)
(Y,Ca,Fe,Th)(Ti,Nb)
 
2
(O,OH)
 
6
18.2.16Nioboaeschynite-(Ce)
(Ce,Ca,Th)(Nb,Ti)
 
2
(O,OH)
 
6
18.2.17Niobo-aeschynite-(Nd)
(Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)
 
2
(O,OH)
 
6
18.2.18Tantalaeschynite-(Y)
(Y,Ce,Ca)(Ta,Ti,Nb)
 
2
O
 
6
18.2.19Vigezzite
(Ca,Ce)(Nb,Ti)
 
2
O
 
6
18.2.20Murataite-(Y)
(Na,Y)
 
4
(Zn,Fe)
 
3
(Ti,Nb)
 
6
O
 
18
(F,OH)
 
4

Other Names for Fergusonite-(Nd)

German names:
β-Fergusonit-(Nd)Fergusonit-(Nd)
Russian names:
Фергусонит-(Nd)

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.

Internet Links for Fergusonite-(Nd)

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    Localities for Fergusonite-(Nd)

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    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.
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    (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.
    China
     
    • Inner Mongolia Autonomous Region
      • Baotou League
        • Darhan Muminggan United Banner
          • Bayan Obo
    		AM 74 (1989), 946
    Russia
     
    • Eastern-Siberian Region
      • Transbaikalia (Zabaykalye)
        • Buriatia (Buryatia) Republic
          • Vitim Plateau
            • Biraya and Bya Rivers confluence area (Chara Basin)
    		C. Lemanski, Jr. (re-entry of lost Mindat data).
    Mineral and/or Locality
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