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Usturite

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About UsturiteHide

Formula:
Ca3SbZr(Fe3+O4)3
Crystal System:
Isometric
Name:
First named bitikleite-(ZrFe), but according to the new nomenclature of the garnet supergroup (Grew et al. 2013) suffixes should not be used in naming minerals in the garnet supergroup. The name was changed to usturite, for Ustur, a mountain in the North Caucasus near the type locality.
Forms solid-solution series with Kerimasite, Kimzeyite, Morimotoite, Schorlomite and Toturite.


Classification of UsturiteHide

Approved
Approval Year:
2009
First Published:
2010

Chemical Properties of UsturiteHide

Formula:
Ca3SbZr(Fe3+O4)3
IMA Formula:
Ca3(SbZr)(FeO4)3

Crystallography of UsturiteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Ia3d
Setting:
I41/a 3 2/d
Cell Parameters:
a = 12.49 Å
Unit Cell V:
1948.4 ų
Z:
8

Type Occurrence of UsturiteHide

General Appearance of Type Material:
Crystals up to 50 µm across, consisting of kimzeyite cores and thin subsequent zones of complex lakargiite-tazheranite-kimzeyite pseudomorphs after zircon.
Geological Setting of Type Material:
Accessory mineral in the cuspidine zone of high-temperature skarns in a carbonate-silicate xenolith at the contact with ignimbrites.
Associated Minerals at Type Locality:

Synonyms of UsturiteHide

Relationship of Usturite to other SpeciesHide

Other Members of this group:
BitikleiteCa3SbSn(AlO4)3Iso. m3m (4/m 3 2/m) : Ia3d
DzhuluiteCa3SbSnFe3+3O12Iso. m3m (4/m 3 2/m) : Ia3d
ElbrusiteCa3(Zr1.5U6+0.5)Fe3+3O12Iso. m3m (4/m 3 2/m) : Ia3d

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.

References for UsturiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Gałuskina, I.O., Gałuskin, E.V., Armbruster, T., Lazić, B., Dzierżanowski, P., Gazeev, V.M, Prusik, K., Pertsev, N.N., Winiarski, A., Zadov, A.E., Wrzalik, R., Gurbanov, A.G. (2010) Bitikleite-(SnAl) and bitikleite-(ZrFe): New garnets from xenoliths of the Upper Chegem volcanic structure, Kabardino-Balkaria, Northern Caucasus, Russia. American Mineralogist 95(7), 959-967.
Grew, E.S., Locock, A.J, Mills, S.J., Galuskina, I.O., Galuskin, E.V., Hålenius, U. (2013) Nomenclature of the garnet supergroup. American Mineralogist: 98(4): 785-811.

Internet Links for UsturiteHide

Localities for UsturiteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia
 
  • Northern Caucasus Region
    • Kabardino-Balkarian Republic
      • Baksan Valley
        • Upper Chegem volcanic caldera (Verkhnechegemskaya caldera)
Gałuskina, I.O., Gałuskin, E.V., Armbruster, T., Lazić, B., Dzierżanowski, P., Gazeev, V.M, Prusik, K., Pertsev, N.N., Winiarski, A., Zadov, A.E., Wrzalik, R., Gurbanov, A.G. (2010): American Mineralogist 95(7), 959-967.
Gałuskina, I.O., Gałuskin, E.V., Armbruster, T., Lazić, B., Dzierżanowski, P., Gazeev, V.M, Prusik, K., Pertsev, N.N., Winiarski, A., Zadov, A.E., Wrzalik, R., Gurbanov, A.G. (2010): American Mineralogist 95(7), 959-967.
Mineral and/or Locality  
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