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Fergusonite-(Nd)

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Formula:
(Nd,Ce)(Nb,Ti)O4
Hardness:
5½ - 6½
Name:
For its relation to fergusonite-(Y), and its dominant neodymium content. After Robert Ferguson (1767-1840), Scottish landowner, politician and mineral collector.
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)

Published without Approval 1989
7.GA.05

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

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
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
Max Birefringence:
δ = 0.100
Image 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)O4
Essential elements:
All elements listed in formula:

Relationship of Fergusonite-(Nd) to other Species

7.GA.05Fergusonite-(Ce)(Ce,La,Nd)NbO4
7.GA.05Fergusonite-(Y)YNbO4
7.GA.05PowelliteCa(MoO4)
7.GA.05ScheeliteCa(WO4)
7.GA.05StolzitePb(WO4)
7.GA.05WulfenitePb(MoO4)
7.GA.10Formanite-(Y)YTaO4
7.GA.10Iwashiroite-(Y)Y(Ta,Nb)O4
7.GA.15Paraniite-(Y)Ca2Y(AsO4)(WO4)2
18.2.1Fergusonite-(Y)YNbO4
18.2.2Fergusonite-(Y)-βYNbO4
18.2.3Fergusonite-(Ce)(Ce,La,Nd)NbO4
18.2.4Fergusonite-(Ce)-β(Ce,La,Nd)NbO4
18.2.6Fergusonite-(Nd)-β(Nd,Ce)NbO4
18.2.7Formanite-(Y)YTaO4
18.2.8Pyrochlore GroupA2Nb2(O,OH)6Z
18.2.9Ceriopyrochlore (of Hogarth 1977)
18.2.10Strontiopyrochlore (of Hogarth 1977)
18.2.11Loparite-(Ce)(Na,Ce,Ca,Sr,Th)(Ti,Nb,Fe)O3
18.2.12Fersmite(Ca,Y)(Nb,Ta,Ti)2(O,OH)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
18.2.17Nioboaeschynite-(Nd)(Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)2(O,OH)6
18.2.18Tantalaeschynite-(Y)(Y,Ce,Ca)(Ta,Ti,Nb)2O6
18.2.19Vigezzite(Ca,Ce)(Nb,Ti)2O6
18.2.20Murataite-(Y)(Y,Na)6Zn(Zn,Fe3+)4(Ti,Nb,Na)12O29(O,F,OH)10F4

Other Names for Fergusonite-(Nd)

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.

Internet Links for Fergusonite-(Nd)

Localities for Fergusonite-(Nd)

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.
China
 
  • Inner Mongolia Autonomous Region
    • Baotou League (Baotou Prefecture)
      • Bayan Obo Mining District
        • Bayan Obo
Qingchang Meng (1981): Geology and Prospecting 17(3), 10-17
Zhang Peishan, Yang Zhuming, Tao Kejie, and Yang Xueming (1996): "Mineralogy and Geology of Rare Earths in China", Science Press (Beijing), 226 pp.
Mongolia
 
  • Hovd Aimag (Khovd Aimag)
    • Altai Mts
      • Khaldzan Buragtag massif
Pavel M. Kartashov analytical data (2012), specimens selfcollected in 1990
Russia
 
  • Eastern-Siberian Region
    • Prebaikalia (Pribaikal'e)
      • Irkutskaya Oblast'
        • Vitim Plateau
          • Biraya and Bya Rivers confluence area (Chara Basin)
Koneva A.A., Konev A.A., Vladykin N.V. (2010) Vein complex of the Biraya carbonatite deposit. in Abstracts of XXVII International conference School «Geochemistry of Alkaline rocks». – Moscow-Koktebel’. pp. 240 pp.
Mills, S. J., Kartashov, P. M., Kampf, A. R., Konev, A. A., Koneva, A. A., & Raudsepp, M. (2012). Cordylite-(La), A New Mineral Species In Fenite From The Biraya Fe–Ree Deposit, Irkutsk, Russia. The Canadian Mineralogist, 50(5), 1281-1290.
Mineral and/or Locality  
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