Gadolinite-(Y) (original) (raw)
A valid IMA mineral species - grandfathered
About Gadolinite-(Y)Hide
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Often slightly radioactive due to minor U and/or Th contents; therefore often metamict.
Colour:
Black, greenish-black, brown
Specific Gravity:
4.36 - 4.77
Crystal System:
Monoclinic
Name:
Named in honor of Johan Gadolin (5 June 1760, Turku, Finland - 15 August 1852, Mynämäki, Finland), chemist, physicist, and mineralogist. He discovered what would be the element yttrium, the first rare earth discovered. The "-(Y)" suffix was added in 1987 and is for to the predominance of yttrium as the REE in the composition.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:1628:1
c1928e53-6d45-4b70-aed3-e345d7f16b64
IMA Classification of Gadolinite-(Y)Hide
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Approved, 'Grandfathered' (first described prior to 1959)
IMA status notes:
Renamed by the IMA
IMA Formula:
Y2Fe2+Be2O2(SiO4)2
Classification of Gadolinite-(Y)Hide
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9.AJ.20
9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4
54.2.1b.3
54 : NESOSILICATES Borosilicates and Some Beryllosilicates
2 : Borosilicates and Some Beryllosilicates with B in [4] coordination
14.3.23
14 : Silicates not Containing Aluminum
3 : Silicates of Be
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Gad-Y | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Gad | Siivolam & Schmid (2007) | Siivolam, J. and Schmid, R. (2007) Recommendations by the IUGS Subcommission on the Systematics of Metamorphic Rocks: List of mineral abbreviations. Web-version 01.02.07. IUGS Commission on the Systematics in Petrology. download |
Physical Properties of Gadolinite-(Y)Hide
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Colour:
Black, greenish-black, brown
Fracture:
Splintery, Conchoidal
Density:
4.36 - 4.77 g/cm3 (Measured) 4.41 g/cm3 (Calculated)
Optical Data of Gadolinite-(Y)Hide
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RI values:
_n_α = 1.770 _n_β = 1.790 _n_γ = 1.820
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Dispersion:
r > v distinct
Chemistry of Gadolinite-(Y)Hide
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Mindat Formula:
Y2Fe2+Be2Si2O10
Often slightly radioactive due to minor U and/or Th contents; therefore often metamict.
Crystallography of Gadolinite-(Y)Hide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 10.000(2) Å, b = 7.565(2) Å, c = 4.768(1) Å
β = 90.31(2)°
Ratio:
a:b:c = 1.322 : 1 : 0.63
Unit Cell V:
360.69 ų (Calculated from Unit Cell)
Morphology:
Prismatic, massive
Crystal StructureHide
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ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0000960 | Gadolinite-(Y) | Miyawaki R, Nakai I, Nagashima K (1984) A refinement of the crystal structure of gadolinite American Mineralogist 69 948-953 | 1984 | 0 | 293 | ||
0004599 | Gadolinite-(Y) | Camara F, Oberti R, Ottolini L, Ventura G D, Bellatreccia F (2008) The crystal chemistry of Li in gadolinite American Mineralogist 93 996-1004 | 2008 | Vico lake, Latium, Italy | 0 | 293 | |
0005286 | Gadolinite-(Y) | Demartin F, Pilati T, Diella V, Gentile P, Gramaccioli C M (1993) A crystal-chemical investigation of alpine gadolinite The Canadian Mineralogist 31 127-136 | 1993 | Moos, Rauris, Austria | 0 | 293 | |
0005287 | Gadolinite-(Y) | Demartin F, Pilati T, Diella V, Gentile P, Gramaccioli C M (1993) A crystal-chemical investigation of alpine gadolinite The Canadian Mineralogist 31 127-136 | 1993 | Beura, Ossola, Italy | 0 | 293 | |
0005288 | Gadolinite-(Y) | Demartin F, Pilati T, Diella V, Gentile P, Gramaccioli C M (1993) A crystal-chemical investigation of alpine gadolinite The Canadian Mineralogist 31 127-136 | 1993 | Val Nalps, Switzerland | 0 | 293 | |
0005289 | Gadolinite-(Y) | Demartin F, Pilati T, Diella V, Gentile P, Gramaccioli C M (1993) A crystal-chemical investigation of alpine gadolinite The Canadian Mineralogist 31 127-136 | 1993 | "Strada", Val Vigezzo, Italy | 0 | 293 | |
0005290 | Gadolinite-(Y) | Demartin F, Pilati T, Diella V, Gentile P, Gramaccioli C M (1993) A crystal-chemical investigation of alpine gadolinite The Canadian Mineralogist 31 127-136 | 1993 | "Bosco", Val Vigezzo, Italy | 0 | 293 | |
0005291 | Gadolinite-(Y) | Demartin F, Pilati T, Diella V, Gentile P, Gramaccioli C M (1993) A crystal-chemical investigation of alpine gadolinite The Canadian Mineralogist 31 127-136 | 1993 | Monte Bassetta, Val Vigezzo, Italy | 0 | 293 | |
0005292 | Gadolinite-(Y) | Demartin F, Pilati T, Diella V, Gentile P, Gramaccioli C M (1993) A crystal-chemical investigation of alpine gadolinite The Canadian Mineralogist 31 127-136 | 1993 | Glogstafelberg, Val Formazza, Italy | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.818 Å | (100) |
2.816 Å | (100) |
4.735 Å | (80) |
2.932 Å | (70) |
2.558 Å | (60) |
2.539 Å | (55) |
3.118 Å | (50) |
Comments:
Synthetic. The data are from Ito and Hafner (1974).
Geological EnvironmentHide
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Geological Setting:
Granites and alkalic granitic pegmatites
Type Occurrence of Gadolinite-(Y)Hide
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Place of Conservation of Type Material:
No designated type material.
Synonyms of Gadolinite-(Y)Hide
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Other Language Names for Gadolinite-(Y)Hide
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Simplified Chinese:硅铍钇矿
Traditional Chinese:矽鈹釔礦
Varieties of Gadolinite-(Y)Hide
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Calciogadolinite-(Y) | A Ca-dominant gadolinite. Although Ca dominates over any individual REE, the current site dominance rules do not allow for species status because trivalent elements (mostly REE) dominate over total divalent elements (mostly Ca) on the site. |
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Relationship of Gadolinite-(Y) to other SpeciesHide
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Other Members of this group:
Calcybeborosilite-(Y) | (Y,Ca)2(◻,Fe2+)(B,Be)2[SiO4]2(OH,O)2 | Mon. |
---|---|---|
Gadolinite-(Ce) | (Ce,La,Nd,Y)2Fe2+Be2Si2O10 | Mon. 2/m |
Gadolinite-(Nd) | Nd2Fe2+Be2O2(SiO4)2 | Mon. 2/m : _P_21/b |
Hingganite-(Ce) | (Ce,REE)2(◻,Fe2+)Be2[SiO4]2(OH)2 | Mon. 2/m : _P_21/b |
Hingganite-(Nd) | Nd2◻Be2Si2O8(OH)2 | Mon. 2/m : _P_21/b |
Hingganite-(Y) | (Y,REE,Ca)2(◻,Fe2+)Be2[SiO4]2(OH)2 | Mon. 2/m : _P_21/b |
Hingganite-(Yb) | (Yb,Y,REE)2◻Be2[SiO4]2(OH)2 | Mon. 2/m : _P_21/b |
Minasgeraisite-(Y) | (Ca2Y2)◻2(Be2B2)[SiO4]4(OH)4 | Tric. 1 : _P_1 |
Unnamed (OH-analogue of Gadolinite-(Y)) | (Y,Ca)2(Fe,◻)Be2Si2O8(OH,O)2 | Mon. 2/m |
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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9.AJ. | Hingganite-(Nd) | Nd2◻Be2Si2O8(OH)2 | Mon. 2/m : _P_21/b |
---|---|---|---|
9.AJ. | Arrheniusite-(Ce) | CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11 | Trig. 3_m_ : R_3_m |
9.AJ.05 | Grandidierite | (Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
9.AJ.05 | Ominelite | (Fe2+,Mg)(Al,Fe3+)3(SiO4)(BO3)O2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
9.AJ.10 | Dumortierite | Al(Al2O)(Al2O)2(SiO4)3(BO3) | Orth. m m m _(_2/_m_2/_m_2/m ) |
9.AJ.10 | Holtite | (Ta0.6◻0.4)Al6BSi3O18(O,OH)2.25 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
9.AJ.10 | Magnesiodumortierite | Mg(Al2OH)(Al2O)2(SiO4)3(BO3) | Orth. m m m _(_2/_m_2/_m_2/m ) |
9.AJ.10 | Nioboholtite | (Nb0.6◻0.4)Al6BSi3O18 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c m |
9.AJ.10 | Titanoholtite | (Ti0.75◻0.25)Al6BSi3O18 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c m |
9.AJ.15 | Garrelsite | Ba3NaSi2B7O16(OH)4 | Mon. 2/m : _B_2/b |
9.AJ.20 | Muromontite | near Be2FeY2Si3O12 | |
9.AJ.20 | Datolite | CaB(SiO4)(OH) | Mon. 2/m : _P_21/b |
9.AJ.20 | Gadolinite-(Ce) | (Ce,La,Nd,Y)2Fe2+Be2Si2O10 | Mon. 2/m |
9.AJ.20 | Hingganite-(Ce) | (Ce,REE)2(◻,Fe2+)Be2[SiO4]2(OH)2 | Mon. 2/m : _P_21/b |
9.AJ.20 | Hingganite-(Y) | (Y,REE,Ca)2(◻,Fe2+)Be2[SiO4]2(OH)2 | Mon. 2/m : _P_21/b |
9.AJ.20 | Hingganite-(Yb) | (Yb,Y,REE)2◻Be2[SiO4]2(OH)2 | Mon. 2/m : _P_21/b |
9.AJ.20 | Homilite | Ca2(Fe2+,Mg)B2Si2O10 | Mon. 2/m : _P_21/b |
9.AJ.20 | Melanocerite-(Ce) | (Ce,Ca)5(SiO4,BO4)3(OH,O) | Hex. |
9.AJ.20 | Minasgeraisite-(Y) | (Ca2Y2)◻2(Be2B2)[SiO4]4(OH)4 | Tric. 1 : _P_1 |
9.AJ.20 | Calcybeborosilite-(Y) | (Y,Ca)2(◻,Fe2+)(B,Be)2[SiO4]2(OH,O)2 | Mon. |
9.AJ.20 | Gadolinite-(Nd) | Nd2Fe2+Be2O2(SiO4)2 | Mon. 2/m : _P_21/b |
9.AJ.20 | Unnamed (OH-analogue of Gadolinite-(Y)) | (Y,Ca)2(Fe,◻)Be2Si2O8(OH,O)2 | Mon. 2/m |
9.AJ.25 | Stillwellite-(Ce) | (Ce,La,Ca)BSiO5 | Trig. 3 : _P_31 |
9.AJ.30 | Cappelenite-(Y) | Ba(Y,Ce)6Si3B6O24F2 | Trig. 3 : _P_3 |
9.AJ.35 | Okanoganite-(Y) | (Na,Ca)3(Y,Ce)12Si6B2O27F14 | Trig. 3_m_ : R_3_m |
9.AJ.35 | Vicanite-(Ce) | (Ca,Ce,La,Th)15As5+(As3+0.5,Na0.5)Fe3+Si6B4O40F7 | Trig. 3_m_ : R_3_m |
9.AJ.35 | Hundholmenite-(Y) | (Y,REE,Ca,Na)15(Al,Fe3+)(CaxAs3+1-x)(Si,As5+)Si6B3(O,F)48 | Trig. 3_m_ : R_3_m |
9.AJ.35 | Proshchenkoite-(Y) | Ca(Y,REE,Ca,Na,Mn)15Fe2+(P,Si)Si6B3O34F14 | Trig. 3_m_ : R_3_m |
9.AJ.35 | Laptevite-(Ce) | Ca6(Fe2+,Mn2+)Y3REE7(SiO4)3(PO4)(B3Si3O18)(BO3)F11 | Trig. 3_m_ : R_3_m |
9.AJ.40 | Jadarite | LiNaSiB3O7(OH) | Mon. 2/m |
Other InformationHide
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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 Gadolinite-(Y)Hide
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References for Gadolinite-(Y)Hide
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Reference List:
Bačík, Peter, Miyawaki, Ritsuro, Atencio, Daniel, Cámara, Fernando, Fridrichová, Jana (2017) Nomenclature of the gadolinite supergroup. European Journal of Mineralogy, 29 (6) 1067-1082 doi:10.1127/ejm/2017/0029-2659
Localities for Gadolinite-(Y)Hide
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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
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.