Dmitryivanovite

Dmitryivanovite is a natural mineral composed of calcium, aluminium and oxygen, with the molecular formula CaAl2O4. It was reported in 2009[3] in a calcium-aluminium-rich inclusion in the carbonaceous chondrite meteorite 470 (NWA470) CH3, which landed in North Africa. The mineral name was chosen to[4] honor Dmitriy A. Ivanov (1962–1986), a geologist, mineralogist, and petrologist who died on a field expedition.[3][5][6]

Dmitryivanovite
General
CategoryOxide mineral
Formula
(repeating unit)		CaAl2O4
Strunz classification4.BC.10
Crystal systemMonoclinic
Crystal classPrismatic (2/m)
Space groupP21/c
Unit cella = 7.95, b = 8.62
c = 10.25 [Å]; β = 93.1°; Z = 12
Identification
ColorColorless
Crystal habitPhase in CAI of 470 (NWA470) CH3 chondrite as subhedral grains
References[1][2]

It is the high-pressure CaAl2O4 dimorph of krotite.

See also

References
  1. Webmineral data
  2. Mindat.org
  3. Mikouchi, T.; Zolensky, M.; Ivanova, M.; Tachikawa, O.; Komatsu, M.; Le, L.; Gounelle, M. (2009). "Dmitryivanovite: A new high-pressure calcium aluminum oxide from the Northwest Africa 470 CH3 chondrite characterized using electron backscatter diffraction analysis". American Mineralogist. 94 (5–6): 746–750. Bibcode:2009AmMin..94..746M. doi:10.2138/am.2009.3080.
  4. "New minerals approved by the IMA-CNMNC in September 2010" (PDF).
  5. Zolensky, M; Mikouchi, T (2010). "Structures of Extraterrestrial Minerals Revealed by EBSD". Microscopy and Microanalysis. 16: 676–677. Bibcode:2010MiMic..16..676Z. doi:10.1017/S1431927610056060.
  6. Dougill, Maryon W. (1957). "Crystal Structure of Calcium Monoaluminate". Nature. 180 (4580): 292–293. Bibcode:1957Natur.180..292D. doi:10.1038/180292a0.
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