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Elbrusite (Elbrusit)

Collectors Summary

Cleavages keine
Crystal System kubisch, Ia3d

Chemism

Chemical formula

{Ca3}[U6+0.5Zr1.5](Fe3+3)O12

Additional chem. information

Granat-Gruppe

Chemical composition

Calcium, Eisen, Zirconium, Sauerstoff, Uran

Unit weight: 735.6147165 u; Number of atoms in the formula: 20

Info

Empirical formula:

{Ca3}[U0.5Zr1.5](Fe3)O12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

26.10

12

60.00

15.9994300

191.9931600

Calcium

Ca

16.34

3

15.00

40.0784000

120.2352000

Iron

Fe

22.77

3

15.00

55.8452000

167.5356000

Zirconium

Zr

18.60

1.5

7.50

91.2242000

136.8363000

Uranium

U

16.18

0.5

2.50

238.0289130

119.0144565

Analysis wt%

SiO2 : 0.79, UO3 : 25.14, TiO2 : 2.12, ZrO2 : 17.11, SnO2 : 5.13, Al2O3 : 3.67, Fe2O3 : 16.80, FeO : 5.36, ThO2 : 0.65, CaO : 22.76 (Ref: American Mineralogist 2010)

Strunz 9th edition incl. updates

9.AD.25

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
D: Insel(Neso)silikate ohne weitere Anionen; Kationen in oktahedraler [6] und gewöhnlich größerer Koordination
25:Granat-Gruppe

Lapis Classification

IV/A.07-080

IV: OXIDE
A: Oxide mit Verhältnis Metall : Sauerstoff = 1:1 und 2:1 (M2O, MO)

Classification by Hölzel

4.DM.160

4: OXIDES
D: Dioxides
M: Oxides with Garnet structure

IMA status

anerkannt, Neue Mineralien - IMA Web-Seite, Okt. 2009

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Garnet supergroup  ⇒ Oxide garnets; Bitikleite group (Z charge 9)

Optical Properties

max. Birefringence

0.000

2V angle

Isotropisch

Crystallography

Crystal System

kubisch

Class (H-M)

m3m

Space Group number

230

Space Group

Ia3d

Cell parameters a (Å)

12.746

Cell parameters b (Å)

-

Cell parameters c (Å)

-

Cell parameters a/b or c/a

1

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

8

Volume (ų)

2070.722

Crystal structure

Struktur bestimmt

X-Ray Powder Diffraction

2.846(1), 2.598(1), 2.012(1), 1.701(1), 1.423(1), 1.357(1)

XRD chart Elbrusite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Physical Properties

Density (g/cm³)

4.801 (berechnet)

4.719 ( ρ calc. Mineralienatlas )

Cleavages

keine

(Co-)Type locality

(Co-)Type locality

Russland/Nordkaukasus, Föderationskreis/Kabardino-Balkarien, Republik/Obere vulkanische Chegem-Struktur (Verkhnechegemskaya Caldera)

Russland/Nordkaukasus, Föderationskreis/Kabardino-Balkarien, Republik/Obere vulkanische Chegem-Struktur (Verkhnechegemskaya Caldera)/Lakargi-Gebirge

Paragenesis of type material

Spurrit, Rondorfit, Wadalit, Kimzeyit, Perowskit, Lakargiit, Ellestadit-(OH), Hillebrandit, Afwillit, Hydrocalumit, Mineral(e) der Ettringit-Gruppe, Hydrogrossular

Preface

Author (Name, Year)

Irina O. Galuskina, Evgeny V. Galuskin, Thomas Armbruster, Biljana Lazic, Joachim Kusz, Piotr Dzierzanowski, Viktor M. Gazeev, Nikolai N. Pertsev, Krystian Prusik, Aleksandr E. Zadov, Antoni Winiarski, Roman Wrzalik, Anatoly G. Gurbanov (2010)

References

Neue Mineralien - IMA Web-Seite, Okt. 2009

Irina O. Galuskina, Evgeny V. Galuskin, Thomas Armbruster, Biljana Lazic, Joachim Kusz, Piotr Dzierzanowski, Viktor M. Gazeev, Nikolai N. Pertsev, Krystian Prusik, Aleksandr E. Zadov, Antoni Winiarski, Roman Wrzalik, Anatoly G. Gurbanov: Elbrusite-(Zr)—A new uranian garnet from the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia. American Mineralogist Vol. 95, Nr. 8-9 (2010) S. 1172-1181.

Grew, E.S., Locock, A.J., Mills, S.J., Galuskina, I.O., Galuskin, E.V., Halenius, U., 2012; Counting garnets: a new nomenclature of the garnet supergroup; European Mineralogical Conference; Vol. 1, EMC2012-21-2

Grew, E.S., Locock, A.J., Mills, S.J., Galuskina, I.O., Galuskin, E.V., Halenius, U., 2012; Nomenclature of the garnet supergroup. American Mineralogist; preprint December 2012 - [Formel]

IMA group assignments

Other languages

German

Elbrusit

English

Elbrusite

Russian

Эльбрусит

old name

German

Elbrusit-(Zr)

Grew, E.S., Locock, A.J., Mills, S.J., Galuskina, I.O., Galuskin, E.V., Halenius, U., 2012; Counting garnets: a new nomenclature of the garnet supergroup; European Mineralogical Conference; Vol. 1, EMC2012-21-2

English

Elbrusite-(Zr)

Grew, E.S., Locock, A.J., Mills, S.J., Galuskina, I.O., Galuskin, E.V., Halenius, U., 2012; Counting garnets: a new nomenclature of the garnet supergroup; European Mineralogical Conference; Vol. 1, EMC2012-21-2

CNMNC (IMA)-Number

IMA 2009-051

CNMNC symbol

Symbol

Ebs

Locations with GPS information

IDs

GUSID (Global unique identifier short form) gIh6OZAUIkawt8Ofk9uSqA
GUID (Global unique identifier) 397A8880-1490-4622-B0B7-C39F93DB92A8
Database ID 5279