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Eltyubyuite

A valid IMA mineral species
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03246350015843566336293.jpg
Eltyubyuite, etc.

Xenolith no. 1, Lakargi Mountain, Upper Chegem volcanic caldera, Baksan Valley, Kabardino-Balkaria, Russia
03246350015843566336293.jpg
Eltyubyuite, etc.

Xenolith no. 1, Lakargi Mountain, Upper Chegem volcanic caldera, Baksan Valley, Kabardino-Balkaria, Russia
09052430015843566339782.jpg
Eltyubyuite, etc.

Xenolith no. 1, Lakargi Mountain, Upper Chegem volcanic caldera, Baksan Valley, Kabardino-Balkaria, Russia
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About EltyubyuiteHide

07218600017073739791636.jpg
Eltyubyu, Russia
Formula:
Ca12Fe3+10Si4O32Cl6
Colour:
Yellow to light brown and brown
Specific Gravity:
3.349 (Calculated)
Crystal System:
Isometric
Member of:
Wadalite Group
Name:
After the Balkarian village Eltyubyu, which is situated near the type locality.
Fe3+ analogue of wadalite. Isostructural with mayenite (chlormayenite).

Fe and Si are disordered over the tetrahedral T1 and T2 sites (Al-free material from Shadil-Khokh volcano).


Unique IdentifiersHide

Mindat ID:
42818
Long-form identifier:
mindat:1:1:42818:7
GUID
(UUID V4):
cb4ee07b-3cac-4957-bfec-81fc18919a91

IMA Classification of EltyubyuiteHide

Classification of EltyubyuiteHide

Strunz-mindat (2024):
9.AD.25

9 : SILICATES (Germanates)
A : Nesosilicates
D : Nesosilicates without additional anions; cations in [6] and/or greater coordination

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
EltIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of EltyubyuiteHide

Colour:
Yellow to light brown and brown
Comment:
in transmitted light under the optical microscope
Density:
3.349 g/cm3 (Calculated)

Optical Data of EltyubyuiteHide

Type:
Isotropic
RI values:
n = 1.85
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Very High

Chemistry of EltyubyuiteHide

Mindat Formula:
Ca12Fe3+10Si4O32Cl6
Elements listed:
Ca, Cl, Fe, O, Si - search for minerals with similar chemistry

Crystallography of EltyubyuiteHide

Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
I4 3d
Cell Parameters:
a = 12.20(3) Å
Unit Cell V:
1815.85 ų
Z:
2
Comment:
Shadil-Khohk volcano material: a=12.2150(2), V=1822.55(6)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.981 Å(30)
3.261 Å(13)
3.050 Å(49)
2.728 Å(100)
2.490 Å(62)
2.227 Å(13)
1.692 Å(28)
1.630 Å(40)
Comments:
Calculated.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
45b : [Other oxidized fumarolic minerals]
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere<0.6
51 : Pyrometamorphic minerals (see also #54 and #56)<0.36
Stage 10b: Anthropogenic minerals<10 Ka
54 : Coal and other mine fire minerals (see also #51 and #56)
Geological Setting:
Shadil-Khohk volcano: contact zone of an altered carbonate-silicate xenolith within plagiodacites

Type Occurrence of EltyubyuiteHide

Type Locality:
ⓘ Xenolith no. 1, Lakargi Mountain, Upper Chegem volcanic caldera (Verkhnechegemskaya caldera), Baksan Valley, Kabardino-Balkaria, Russia
General Appearance of Type Material:
Micrometre-sized inclusions in rondorfite.
Place of Conservation of Type Material:
Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, cataloge numbers 4027/1 and 4027/2
Geological Setting of Type Material:
In altered silicate-carbonate xenoliths in the diatreme facies of ignimbrites.
Associated Minerals at Type Locality:
SrebrodolskitePerovskiteLakargiiteKerimasiteHydroxylellestadite
HydroxyledgrewiteFluorchegemiteEdgrewiteDovyreniteCuspidine
Chegemite
Reference:
Galuskin, E.V., Galuskina, I.O., Bailau, R., Prusik, K., Gazeev, V.M., Zadov, A.E., Pertsev, N.N., Jeżak, L., Gurbanov, A.G. and Dubrovinsky, L. (2013) Eltyubyuite, Ca12Fe3+10Si4O32Cl6 - the Fe3+ analogue of wadalite: a new mineral from the Northern Caucasus, Kabardino-Balkaria, Russia. European Journal of Mineralogy: 25: 221-229.

Synonyms of EltyubyuiteHide

Relationship of Eltyubyuite to other SpeciesHide

Member of:
Wadalite Group
Other Members of this group:
AdrianiteCa12(Al4Mg3Si7)O32Cl6Iso. 4 3m : I4 3d
Wadalite(Ca,Mg)6(Al,Fe3+)4((Si,Al)O4)3O4Cl3Iso. 4 3m : I4 3d

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Eltyubyuite associated with RondorfiteCa8Mg(SiO4)4Cl2
1 photo of Eltyubyuite associated with LarniteCa2SiO4
1 photo of Eltyubyuite associated with Grossular-Hibschite Series

Related Minerals - Strunz-mindat GroupingHide

9.AD.AdrianiteCa12(Al4Mg3Si7)O32Cl6Iso. 4 3m : I4 3d
9.AD.05LarniteCa2SiO4Mon. 2/m
9.AD.10Calcio-olivineCa2SiO4Orth. mmm (2/m 2/m 2/m)
9.AD.15MerwiniteCa3Mg(SiO4)2Mon. 2/m : P21/b
9.AD.20BredigiteCa7Mg(SiO4)4Orth. mm2 : Pnn2
9.AD.25AndraditeCa3Fe3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25AlmandineFe2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25CalderiteMn2+3Fe3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25GoldmaniteCa3V3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25GrossularCa3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25HenritermieriteCa3Mn3+2(SiO4)2[◻(OH)4]Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AD.25KimzeyiteCa3Zr2(SiO4)(AlO4)2Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25KnorringiteMg3Cr2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25MajoriteMg3(MgSi)(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25MorimotoiteCa3(TiFe2+)(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25PyropeMg3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25SchorlomiteCa3Ti2(SiO4)(Fe3+O4)2Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25SpessartineMn2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25UvaroviteCa3Cr2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25Wadalite(Ca,Mg)6(Al,Fe3+)4((Si,Al)O4)3O4Cl3Iso. 4 3m : I4 3d
9.AD.25 vaHydrougrandite(Ca,Mg,Fe2+)3(Fe3+,Al)2[(OH)4(SiO4)2]Iso.
9.AD.25 vaYamatoite(Mn2+,Ca)3(V3+,Al)2(SiO4)3Iso.
9.AD.25HoltstamiteCa3Al2(SiO4)2[◻(OH)4]Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AD.25KhohariteMg3Fe3+2(SiO4)3
9.AD.25KerimasiteCa3Zr2(SiO4)(Fe3+O4)2Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25ToturiteCa3Sn2(SiO4)(Fe3+O4)2Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25MomoiiteMn2+3V3+2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25EringaiteCa3Sc2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25IrinarassiteCa3Sn2(SiO4)(AlO4)2Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25Menzerite-(Y)(Y2Ca)Mg2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25BlythiteMn2+3Mn3+2[SiO4]3
9.AD.25SkiagiteFe2+3Fe3+2[SiO4]3
9.AD.25HutcheoniteCa3Ti2(SiO4)(AlO4)2Iso. m3m (4/m 3 2/m) : Ia3d
9.AD.25UM1984-37-SiO:CrMnMn2+3Cr3+2(SiO4)3
9.AD.25RubiniteCa3Ti3+2Si3O12Iso.
9.AD.25NikmelnikoviteCa12(Fe2+Fe3+3Al3◻)[SiO4]6[◻(OH)4]5◻4Trig. 3 : R3
9.AD.30 vaAuerlitenear Th(Si,P)O4
9.AD.30CoffiniteU(SiO4) · nH2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.30HafnonHfSiO4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.30ThoriteTh(SiO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.30ZirconZr(SiO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.30Stetindite-(Ce)Ce(SiO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
9.AD.35HuttoniteThSiO4Mon. 2/m
9.AD.35Tombarthite-(Y)Y4(Si,H4)4O12-x(OH)4+2xMon.
9.AD.40EulytineBi4(SiO4)3Iso. 4 3m : I4 3d
9.AD.45ReiditeZrSiO4Tet. 4/m : I41/a
9.AD.55JeffbeniteMg3Al2Si3O12Tet. 4 2m : I4 2d

Other InformationHide

Notes:
Raman bands of the Shadil-Khokh volcano material [cm-1]: 959 & 901 (Si–O stretching); 783, 705, 450, 307 (FeO45- vibration)
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 EltyubyuiteHide

References for EltyubyuiteHide

Localities for EltyubyuiteHide

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 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.
Czech Republic
 
  • South Moravian Region
    • Brno-Country District
      • Oslavany
Hršelová et al. (2013)
Georgia
 
  • South Ossetia
    • Greater Caucasus Mountain Range
      • Kel’ volcanic area
Galuskin et al. (2013)
Germany
 
  • Rhineland-Palatinate
    • Mayen-Koblenz
      • Vordereifel
Galuskin et al. (2013)
Russia
 
  • Chelyabinsk Oblast
Sharygin (2015)
  • Kabardino-Balkaria
    • Baksan Valley
Galuskin et al. (2013)
        • Lakargi Mountain
Williams et al. (2011) +1 other reference
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