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Unnamed (OH-analogue of Gadolinite-(Y))

Valid as an unnamed mineral
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Formula:
(Y,Ca)2(Fe,◻)Be2Si2O8(OH,O)2
Colour:
Bottle-green
Lustre:
Vitreous
Specific Gravity:
3.903 (Calculated)
Crystal System:
Monoclinic
The OH analogue of gadolinite-(Y) and Fe2+ analogue of hingganite-(Y). A potentially new mineral.


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Unique IdentifiersHide

Mindat ID:
51814
Long-form identifier:
mindat:1:1:51814:3

IMA Classification of Unnamed (OH-analogue of Gadolinite-(Y))Hide

IMA status notes:
Unnamed (probably valid)
First published:
2017

Classification of Unnamed (OH-analogue of Gadolinite-(Y))Hide

Strunz-mindat (2026):
9.AJ.20

9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4

Physical Properties of Unnamed (OH-analogue of Gadolinite-(Y))Hide

Lustre:
Vitreous
Transparency:
Translucent
Colour:
Bottle-green
Streak:
White
Tenacity:
Brittle
Cleavage:
None Observed
Density:
3.903 g/cm3 (Calculated)

Chemistry of Unnamed (OH-analogue of Gadolinite-(Y))Hide

Mindat Formula:
(Y,Ca)2(Fe,◻)Be2Si2O8(OH,O)2
Element Weights:
Element% weight
Y37.843 %
O34.051 %
Si11.955 %
Fe11.885 %
Be3.836 %
H0.429 %

Calculated from ideal end-member formula.
Y
O
Si
Fe
Be
H
Elements listed:
Be, Ca, Fe, H, O, Si, Y - search for minerals with similar chemistry

Chemical AnalysisHide

Crystallography of Unnamed (OH-analogue of Gadolinite-(Y))Hide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 4.7514(10) Å, b = 7.5719(16) Å, c = 9.9414(2) Å
β = 90.015(4)°
Ratio:
a:b:c = 0.628 : 1 : 1.313
Unit Cell V:
357.663 ų
Z:
2
Morphology:
Anhedral grains
Comment:
Space group is P21/c

First Recorded Occurrence of Unnamed (OH-analogue of Gadolinite-(Y))Hide

First Recorded Locality:
ⓘ Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
General Appearance of First Recorded Material:
As semitransparent bottle-green anhedral grains

Synonyms of Unnamed (OH-analogue of Gadolinite-(Y))Hide

Relationship of Unnamed (OH-analogue of Gadolinite-(Y)) to other SpeciesHide

Member of:
Gadolinite Subgroup > Gadolinite Group > Gadolinite Supergroup
Other Members of Gadolinite Subgroup:
Calcybeborosilite-(Y)(Y,Ca)2(◻,Fe2+)(B,Be)2[SiO4]2(OH,O)2Mon.
Hingganite-(Ce)(Ce,REE)2(◻,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/c
Hingganite-(Nd)Nd2◻Be2Si2O8(OH)2Mon. 2/m : P21/c
Hingganite-(Y)(Y,REE,Ca)2(◻,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/c
Hingganite-(Yb)(Yb,Y,REE)2◻Be2[SiO4]2(OH)2Mon. 2/m : P21/c
'Minasgeraisite-(Y)'(Ca2Y2)◻2(Be2B2)[SiO4]4(OH)4Tric. 1 : P1

Related Minerals - Strunz-mindat GroupingHide

9.AJ.Hingganite-(Nd)Nd2◻Be2Si2O8(OH)2Mon. 2/m : P21/c
9.AJ.Arrheniusite-(Ce)CaMg[(Ce7Y3)Ca5](SiO4)4(Si2B3AsO18)(BO3)F11Trig. 3m : R3m
9.AJ.05Ominelite(Fe2+,Mg)(Al,Fe3+)3(SiO4)(BO3)O2Orth. mmm(2/m2/m2/m) : Pnma
9.AJ.05Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2Orth. mmm(2/m2/m2/m) : Pnma
9.AJ.10DumortieriteAl(Al2O)(Al2O)2(SiO4)3(BO3)Orth. mmm(2/m2/m2/m)
9.AJ.10Nioboholtite(Nb0.6◻0.4)Al6BSi3O18Orth. mmm(2/m2/m2/m) : Pbcm
9.AJ.10Titanoholtite(Ti0.75◻0.25)Al6BSi3O18Orth. mmm(2/m2/m2/m) : Pbcm
9.AJ.10Holtite(Ta0.6◻0.4)Al6BSi3O18(O,OH)2.25Orth. mmm(2/m2/m2/m) : Pnma
9.AJ.10MagnesiodumortieriteMg(Al2OH)(Al2O)2(SiO4)3(BO3)Orth. mmm(2/m2/m2/m)
9.AJ.15GarrelsiteBa3NaSi2B7O16(OH)4Mon. 2/m : B2/b
9.AJ.20'Muromontite'near Be2FeY2Si3O12
9.AJ.20Gadolinite-(Nd)Nd2Fe2+Be2O2(SiO4)2Mon. 2/m : P21/c
9.AJ.20DatoliteCaB(SiO4)(OH)Mon. 2/m : P21/c
9.AJ.20Melanocerite-(Ce)(Ce,Ca)5(SiO4,BO4)3(OH,O)Hex.
9.AJ.20Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10Mon. 2/m
9.AJ.20Gadolinite-(Y)Y2Fe2+Be2Si2O10Mon. 2/m : P21/c
9.AJ.20Hingganite-(Ce)(Ce,REE)2(◻,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/c
9.AJ.20Hingganite-(Y)(Y,REE,Ca)2(◻,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/c
9.AJ.20Hingganite-(Yb)(Yb,Y,REE)2◻Be2[SiO4]2(OH)2Mon. 2/m : P21/c
9.AJ.20HomiliteCa2(Fe2+,Mg)B2Si2O10Mon. 2/m : P21/c
9.AJ.20'Minasgeraisite-(Y)'(Ca2Y2)◻2(Be2B2)[SiO4]4(OH)4Tric. 1 : P1
9.AJ.20Calcybeborosilite-(Y)(Y,Ca)2(◻,Fe2+)(B,Be)2[SiO4]2(OH,O)2Mon.
9.AJ.25Stillwellite-(La)LaBSiO5Trig. 32 : P3221
9.AJ.25Stillwellite-(Ce)(Ce,La,Ca)BSiO5Trig. 3 : P31
9.AJ.30Cappelenite-(Y)Ba(Y,Ce)6Si3B6O24F2Trig. 3 : P3
9.AJ.35Laptevite-(Ce)Ca6(Fe2+,Mn2+)Y3REE7(SiO4)3(PO4)(B3Si3O18)(BO3)F11Trig. 3m : R3m
9.AJ.35Proshchenkoite-(Y)Ca(Y,REE,Ca,Na,Mn)15Fe2+(P,Si)Si6B3O34F14Trig. 3m : R3m
9.AJ.35Okanoganite-(Y)(Na,Ca)3(Y,Ce)12Si6B2O27F14Trig. 3m : R3m
9.AJ.35Hundholmenite-(Y)(Y,REE,Ca,Na)15(Al,Fe3+)(CaxAs3+1-x)(Si,As5+)Si6B3(O,F)48Trig. 3m : R3m
9.AJ.35Vicanite-(Ce)(Ca,Ce,La,Th)15As5+(As3+0.5,Na0.5)Fe3+Si6B4O40F7Trig. 3m : R3m
9.AJ.40JadariteLiNaSiB3O7(OH)Mon. 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.

Internet Links for Unnamed (OH-analogue of Gadolinite-(Y))Hide

References for Unnamed (OH-analogue of Gadolinite-(Y))Hide

Localities for Unnamed (OH-analogue of Gadolinite-(Y))Hide

Showing 1 localities.

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.
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Locality ListHide

- 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.
Norway (FRL)
 
  • Telemark
    • Drangedal
      • Tørdal
Chukanov et al. (2017) +1 other reference
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