Dmitryivanovite

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Dmitryivanovite
General
Category Oxide mineral
Formula
(repeating unit)
CaAl2O4
Strunz classification 4.BC.10
Crystal symmetry Monoclinic 2/m prismatic
Unit cell a = 7.95 Å, b = 8.62 Å, c = 10.25 Å; β = 93.1°
Identification
Color Colorless
Crystal habit Phase in CAI of 470 (NWA470) CH3 chondrite as subhedral grains
Crystal system Monoclinic
References [1][2]

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]

It is the high-pressure CaAl2O4 dimorph of krotite.

See also[edit]

References[edit]

  1. ^ Webmineral data
  2. ^ Mindat.org
  3. ^ a b 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. doi:10.2138/am.2009.3080. 
  4. ^ "New minerals approved by the IMA-CNMNC in September 2010". 
  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.