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Ust'-Biraya, Biraya Fe-REE ore occurrence, Biraya and Bya Rivers confluence area (Chara Basin), Vitim Plateau, Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia
© Pavel M. Kartashov
|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)
|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:||188.8.131.52|
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)
|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)
|Simplified for copy/paste:||(Nd,Ce)(Nb,Ti)O4|
|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):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Fergusonite-(Nd)
|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)
Localities for Fergusonite-(Nd)
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.
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Locality Updated: Amadora, Lisbon District, PortugalFrom Rui Nunes, 27th Nov 2014 11:43:51