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Gadolinite Group

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The group has its name after the generic name gadolinite.
The Gadolinite Group of the Gadolinite Supergroup is defined on the basis of the tetrahedral cation Si 4+. It is, according to the new classification established by IMA in 2016 (IMA 16-A), divided into two subgroups: the Gadolinite Subgroup and the Datolite Subgroup.

Members of the gadolinite group (sensu stricto) were, before the new classification, classified in the literature as belonging to the gadolinite group (sensu lato), the datolite group or the datolite-gadolinite group (also designated as 'gadolinite-datolite group').

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Classification of Gadolinite GroupHide

Group Name
Approval History:
Redefined as a group of the Gadolinite Supergroup by IMA in aug. 2016 (Proposal 16-A).

Synonyms of Gadolinite GroupHide

Other Language Names for Gadolinite GroupHide

Relationship of Gadolinite Group to other SpeciesHide

Other Members of this group:
Herderite GroupThe Herderite Group of the Gadolinite Supergroup is defined on the basis of the tetrahedral cation ...
Group Members:
Datolite Subgroup 
  Datolite Ca(HBSiO5)Mon. 2/m : P21/b
  Homilite Ca2(Fe2+,Mg)B2Si2O10Mon.
Gadolinite Subgroup 
  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-(Nd) Nd2Fe2+Be2O2(SiO4)2Mon. 2/m : P21/b
  Gadolinite-(Y) Y2Fe2+Be2Si2O10Mon. 2/m : P21/b
  Hingganite-(Ce) (Ce,REE)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) CaBe2Y2Si2O10Mon. 2/m : P21/b
  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.

Gadolinite Group in petrologyHide

Accessory component of (items highlighted in red)

References for Gadolinite GroupHide

Reference List:
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CNMNC Newsletter No. 33, October 2016, page 1143; Mineralogical Magazine: 80: 1135–1144
DeMartin, F., Pilati, T., Diella, V., Gentile, P. & Gramaccioli, C. M. (1993): A crystal-chemical investigation of Alpine gadolinite. Can. Mineral. 31, 127-136.
Demartin, F., Minaglia, A. & Gramaccioli, C. M. (2001): Characterization of gadolinite-group minerals using crystallographic data only: the case of hingganite-(Y) from Cuasso al Monte, Italy. Canadian Mineralogist 39, 1105-1114.
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.

Internet Links for Gadolinite GroupHide

Localities for Gadolinite GroupHide

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 ListShow

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