Where it forms, where it's found
- Geological setting
Accessory mineral in the cuspidine zone of high-temperature skarns in a carbonate-silicate xenolith at the contact with ignimbrites.
- Type locality
- Xenolith no. 7
- Lakargi Mountain
- Upper Chegem volcanic caldera (Verkhnechegemskaya caldera)
- Chegemsky District
- Kabardino-Balkaria
- Russia
1recorded occurrences
Crystallography
- Space group
- I41/a -3 2/d
- Cell parameters
- a = 12.49 Å
- Unit cell volume
- 1948.4 ų
- Z
- 8
- Type-locality form
Crystals up to 50 µm across, consisting of kimzeyite cores and thin subsequent zones of complex lakargiite-tazheranite-kimzeyite pseudomorphs after zircon.
Chemical composition
Synonyms
- Bitikleite-(ZrFe)
- Usturiet
In other languages
- German
- IMA 2009-053 · Usturit
- Italian
- bitikleite-(ZrFe) · usturite
Classification
Strunz
10th ed.4.CC.32
- 4OxidesClass
- 4.CMetal: Oxygen = 2: 3,3: 5, and similarDivision
- 4.CCWith large and medium-sized cationsGroup
- 4.CC.32UsturiteSpecies
Group, growth & confusion
Literature, links & citation
Citations
- 2010Galuskina, I. O., Galuskin, E. V., Armbruster, T., Lazic, 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 doi:10.2138/am.2010.3458 DOI: 10.2138/am.2010.3458
- 2013Grew, 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 doi:10.2138/am.2013.4201 DOI: 10.2138/am.2013.4201
- 2021(2021) Usturite. Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Usturite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/usturite-40024},
note = {Accessed 2026-05-11}
}