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Gadolinite-(Nd)

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Johan Gadolin
Formula:
Nd2Fe2+Be2O2(SiO4)2
Colour:
Olive-green
Lustre:
Adamantine, Sub-Adamantine, Vitreous
Hardness:
6½ - 7
Specific Gravity:
4.86 (Calculated)
Crystal System:
Monoclinic
Name:
Named for its relationship to gadolinite-(Y), but with neodymium as the dominant rare earth element. Gadolinite honors Johan Gadolin (5 June 1760, Turku, Finland - 15 August 1852, Mynämäki, Finland), chemist, physicist, and mineralogist.
The second mineral combining Nd and Be after hingganite-(Nd).

Approved in 2016; Nd-dominant members had been reported previously (Kolitsch et al., 2008; Pršek et al., 2010).


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Classification of Gadolinite-(Nd)Hide

Approved
Approval Year:
2016
First Published:
2018

Physical Properties of Gadolinite-(Nd)Hide

Adamantine, Sub-Adamantine, Vitreous
Transparency:
Transparent
Colour:
Olive-green
Streak:
White
Hardness:
6½ - 7 on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
None.
Fracture:
Conchoidal
Density:
4.86 g/cm3 (Calculated)

Optical Data of Gadolinite-(Nd)Hide

Type:
Biaxial (-)
RI values:
nα = 1.780(1) nβ = 1.800(1) nγ = 1.810(1)
2V:
Measured: 62 ° (3)
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of Gadolinite-(Nd)Hide

Formula:
Nd2Fe2+Be2O2(SiO4)2

Crystallography of Gadolinite-(Nd)Hide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 4.8216(3) Å, b = 7.6985(4) Å, c = 10.1362(6) Å
β = 90.234(4)°
Ratio:
a:b:c = 0.626 : 1 : 1.317
Unit Cell V:
376.24 ų
Z:
2
Morphology:
Anhedral grains up to 150 μm in size, commonly occurring as aggregates.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.83(72)
3.603(37)
3.191(52)
3.179(32)
3.097(35)
3.014(35)
2.888(100)
2.607(49)

Type Occurrence of Gadolinite-(Nd)Hide

General Appearance of Type Material:
Anhedral grains up to 150 μm in size, commonly occurring as aggregates
Place of Conservation of Type Material:
Mineralogical collections of the Moravian Museum, Brno, Zelný trh 6, CZ-659 37 Brno, Czech Republic (catalogue number B 11298)
Associated Minerals at Type Locality:
Reference:
Škoda, R., Plášil, J., Čopjaková, R., Novák, M., Jonsson, E., Vašinová Galiová, M., Holtstam, D. (2018) Gadolinite-(Nd), a new member of the gadolinite supergroup from Fe-REE deposits of Bastnäs-type, Sweden. Mineralogical Magazine: 82: S133–S145.

Synonyms of Gadolinite-(Nd)Hide

Relationship of Gadolinite-(Nd) to other SpeciesHide

Other Members of this group:
Calcybeborosilite-(Y)(Y,Ca)2(□,Fe2+)(B,Be)2[SiO4]2(OH,O)2Mon.
Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10Mon. 2/m
Gadolinite-(Y)Y2Fe2+Be2Si2O10Mon. 2/m : P21/b
Hingganite-(Ce)(Ce,REE)2(□,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/b
Hingganite-(Nd)(Nd,Y,Ce,Sm)2(◻,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/b
Hingganite-(Y)(Y,REE,Ca)2(□,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/b
Hingganite-(Yb)(Yb,Y,REE)2□Be2[SiO4]2(OH)2
Minasgeraisite-(Y)BiCa(Y,Ln)2(□,Mn)2(Be,B,Si)4Si4O16 [(OH),O]4Tric. 1 : P1
Unnamed (OH-analogue of Gadolinite-(Y))(Y,Ca)2(Fe,☐)Be2Si2O8(OH,O)2Mon. 2/m

Other InformationHide

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 Gadolinite-(Nd)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kolitsch, U., Brandstätter, F., Blass, G. (2008) Baryt, Bismuthinit, Brannerit, Cobaltit, Coelestin, Glieder der Gadolinitgruppe, Galenit, Krupkait, "inkommensurabel modulierter Krupkait", Prehnit, ein Smektitmineral, Stellerit und Strontianit aus den Deponien des Kraftwerkbaues im hinteren Gasteinertal (Sportgastein), Salzburg. Pp. 250-252 in: Niedermayr, G. et al. (2008): Neue Mineralfunde aus Österreich LVII. Carinthia II, 198./118., 223-274 (in German).
Pršek, J., Ondrejka, M., Baéik, P., Budzyń, B., Uher, P. (2010) Metamorphic-hydrothermal REE mineralization in the Bacúch magnetite deposit, western Carpathians, Slovakia: Sr,S-rich monazite-(Ce) and Nd-dominant hingganite. Canadian Mineralogist: 48: 81-94.
Škoda, R., Plášil, J., Čopjaková, R., Novák, M., Jonsson, E., Vašinová Galiová, M., Holtstam, D. (2016) Gadolinite-(Nd), IMA 2016-013. CNMNC Newsletter No. 32, August 2016, page 916; Mineralogical Magazine: 80: 915–922
Škoda, R., Plášil, J., Čopjaková, R., Novák, M., Jonsson, E., Vašinová Galiová, M., Holtstam, D. (2018) Gadolinite-(Nd), a new member of the gadolinite supergroup from Fe-REE deposits of Bastnäs-type, Sweden. Mineralogical Magazine: 82: S133–S145.

Internet Links for Gadolinite-(Nd)Hide

Localities for Gadolinite-(Nd)Hide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Sweden
 
  • Västmanland
    • Norberg
Škoda, R., Plášil, J., Čopjaková, R., Novák, M., Jonsson, E., Vašinová Galiová, M., Holtstam, D. (2018): Gadolinite-(Nd), a new member of the gadolinite supergroup from Fe-REE deposits of Bastnäs-type, Sweden. Mineralogical Magazine, 82, S133–S145.
Hålenius, U., Hatert, F., Pasero, M., Mills, S.J. (2016): New minerals and nomenclature modifications approved in 2016. Mineralogical Magazine: 80(5): 915-922
    • Skinnskatteberg
      • Riddarhyttan
        • Bastnäs Mines
Škoda, R., Plášil, J., Čopjaková, R., Novák, M., Jonsson, E., Vašinová Galiová, M., Holtstam, D. (2018): Gadolinite-(Nd), a new member of the gadolinite supergroup from Fe-REE deposits of Bastnäs-type, Sweden. Mineralogical Magazine, 82, S133–S145.
Mineral and/or Locality  
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