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Tombarthite-(Y)

A discredited species name
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05117780017271927171096.jpg
Tombarthite-(Y)

Høgetveit Feldspar Quarries, Evje og Hornnes, Agder, Norway
05117780017271927171096.jpg
Tombarthite-(Y)

Høgetveit Feldspar Quarries, Evje og Hornnes, Agder, Norway
05117780017271927171096.jpg
Tombarthite-(Y)

Høgetveit Feldspar Quarries, Evje og Hornnes, Agder, Norway
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About Tombarthite-(Y)Hide

09132000017271927224851.jpg
Thomas F. W. Barth
Formula:
Y4(Si,H4)4O12-x(OH)4+2x
(x ≤ 4)
Colour:
Brown- black
Lustre:
Dull
Hardness:
5 - 6
Crystal System:
Monoclinic
Name:
Named after Thomas Fredrik Weiby Barth (1899-1971), professor of geology, Oslo University, Norway.
A mixture of metamict and crystalline phases, among them thalénite-(Y), xenotime-(Y) and kainosite-(Y).

Described as a new mineral by Neumann & Nilssen (1968). Friis (2018, 2019) has re-examined the original material (neotype) and showed that the samples are heterogeneous, and a mixture of metamict and crystalline phases. The original chemical analyses were done on heated material, which removed elements such as C and F, and thus erroneously. The mineral was discredited by IMA in 2016.


Unique IdentifiersHide

Mindat ID:
3992
Long-form identifier:
mindat:1:1:3992:1

IMA Classification of Tombarthite-(Y)Hide

IMA status:
Discredited
Approval year:
1967
First published:
1968
Approval history:
IMA 16-K proposal accepted: discreditation; all samples proved to be of heterogenous nature.

See https://www.mindat.org/forum.php?read,14,448876,448876#msg-448876
First description reference:
Neumann, Henrich, Nilssen, Borghild (1968) Tombarthite, a new mineral from Høgetveit, Evje, South Norway. Lithos, 1 (2) 113-123 doi:10.1016/s0024-4937(68)80003-9

Classification of Tombarthite-(Y)Hide

Strunz-mindat (2026):
9.AD.35

9 : SILICATES (Germanates)
A : Nesosilicates
D : Nesosilicates without additional anions; cations in [6] and/or greater coordination
Dana 8th ed.:
51.5.3.2

51 : NESOSILICATES Insular SiO4 Groups Only
5 : Insular SiO4 Groups Only with cations in >[6] coordination
Hey's CIM Ref.:
14.8.4

14 : Silicates not Containing Aluminum
8 : Silicates of Group III metals other than Al

Physical Properties of Tombarthite-(Y)Hide

Lustre:
Dull
Colour:
Brown- black
Hardness:
5 - 6 on Mohs scale
Fracture:
Conchoidal

Chemistry of Tombarthite-(Y)Hide

Mindat Formula:
Y4(Si,H4)4O12-x(OH)4+2x

(x ≤ 4)
Elements listed:
H, O, Si, Y - search for minerals with similar chemistry

Crystallography of Tombarthite-(Y)Hide

Crystal System:
Monoclinic
Comment:
Partially metamict

First Recorded Occurrence of Tombarthite-(Y)Hide

Synonyms of Tombarthite-(Y)Hide

Other Language Names for Tombarthite-(Y)Hide

Common AssociatesHide

Associations Based on Photo Data:
1 photo of Tombarthite-(Y) associated with BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

Related Minerals - Strunz-mindat GroupingHide

9.AD.AdrianiteCa12(Al4Mg3Si7)O32Cl6Iso. 43m : I43d
9.AD.05LarniteCa2SiO4Mon. 2/m
9.AD.10Calcio-olivineCa2SiO4Orth. mmm(2/m2/m2/m)
9.AD.15MerwiniteCa3Mg(SiO4)2Mon. 2/m : P21/b
9.AD.20BredigiteCa7Mg(SiO4)4Orth. mm2 : Pnn2
9.AD.25MidbariteCa3Mg2(V5+2Si)O12Iso. m3m(4/m32/m) : Ia3d
9.AD.25Menzerite-(Y)(Y2Ca)Mg2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25UvaroviteCa3Cr3+2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25EltyubyuiteCa12Fe3+10Si4O32Cl6Iso. 43m : I43d
9.AD.25EringaiteCa3Sc2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25HenritermieriteCa3Mn3+2(SiO4)2[◻(OH)4]Tet. 4/mmm(4/m2/m2/m) : I41/acd
9.AD.25 va'Hydrougrandite'(Ca,Mg,Fe2+)3(Fe3+,Al)2[(OH)4(SiO4)2]Iso.
9.AD.25CalderiteMn2+3Fe3+2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25NikmelnikoviteCa12(Fe2+Fe3+3Al3◻)[SiO4]6[◻(OH)4]5◻4Trig. 3 : R3
9.AD.25HutcheoniteCa3Ti2(SiO4)(AlO4)2Iso. m3m(4/m32/m) : Ia3d
9.AD.25Wadalite(Ca,Mg)6(Al,Fe3+)4((Si,Al)O4)3O4Cl3Iso. 43m : I43d
9.AD.25RubiniteCa3Ti3+2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25KerimasiteCa3Zr2(SiO4)(Fe3+O4)2Iso. m3m(4/m32/m) : Ia3d
9.AD.25HoltstamiteCa3Al2(SiO4)2[◻(OH)4]Tet. 4/mmm(4/m2/m2/m) : I41/acd
9.AD.25SpessartineMn2+3Al2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25ToturiteCa3Sn2(SiO4)(Fe3+O4)2Iso. m3m(4/m32/m) : Ia3d
9.AD.25KimzeyiteCa3Zr2(SiO4)(AlO4)2Iso. m3m(4/m32/m) : Ia3d
9.AD.25'Khoharite'Mg3Fe3+2(SiO4)3
9.AD.25IrinarassiteCa3Sn2(SiO4)(AlO4)2Iso. m3m(4/m32/m) : Ia3d
9.AD.25KnorringiteMg3Cr3+2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25GoldmaniteCa3V3+2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25'Blythite'Mn2+3Mn3+2[SiO4]3
9.AD.25'Skiagite'Fe2+3Fe3+2[SiO4]3
9.AD.25'UM1984-37-SiO:CrMn'Mn2+3Cr3+2(SiO4)3
9.AD.25AlmandineFe2+3Al2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25 va'Yamatoite'(Mn2+,Ca)3(V3+,Al)2(SiO4)3Iso.
9.AD.25MomoiiteMn2+3V3+2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25GrossularCa3Al2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25AndraditeCa3Fe3+2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25MorimotoiteCa3(TiFe2+)(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25MajoriteMg3(MgSi)(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25PyropeMg3Al2(SiO4)3Iso. m3m(4/m32/m) : Ia3d
9.AD.25SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2Iso. m3m(4/m32/m) : Ia3d
9.AD.30HafnonHf(SiO4)Tet. 4/mmm(4/m2/m2/m) : I41/amd
9.AD.30ZirconZr(SiO4)Tet. 4/mmm(4/m2/m2/m) : I41/amd
9.AD.30CoffiniteU(SiO4) · nH2OTet. 4/mmm(4/m2/m2/m) : I41/amd
9.AD.30ThoriteTh(SiO4)Tet. 4/mmm(4/m2/m2/m) : I41/amd
9.AD.30 va'Auerlite'near Th(Si,P)O4
9.AD.30Stetindite-(Ce)Ce4+SiO4Tet. 4/mmm(4/m2/m2/m) : I41/amd
9.AD.35HuttoniteThSiO4Mon. 2/m
9.AD.40EulytineBi4(SiO4)3Iso. 43m : I43d
9.AD.45ReiditeZr(SiO4)Tet. 4/m : I41/a
9.AD.55JeffbeniteMg3Al2Si3O12Tet. 42m : I42d

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 Tombarthite-(Y)Hide

References for Tombarthite-(Y)Hide

Localities for Tombarthite-(Y)Hide

Showing 5 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)
 
  • Agder
    • Evje og Hornnes
Neumann et al. (1968) +2 other references
    • Iveland
      • Ivedal
Nilssen (1969) +2 other references
    • Vennesla
      • Øvrebø
        • Reiersdal Feldspar Quarries
Griffin et al. (1979) +1 other reference
Romania
 
  • Hunedoara County
HÎRTOPANU et al. (2014)
Switzerland
 
  • Valais
    • Westlich Raron
Berger et al. (2013)
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