First crystal-structure determination of chromites from an acapulcoite and ordinary chondrites
(2015) In Mineralogical Magazine 79(3). p.755-765- Abstract
- We report the first crystal-structure determinations of chromites from an acapulcoite and from ordinary chondrites. Cell edges range from 8.3212 (3) to 8.3501 (1) angstrom, while the oxygen positional parameters are in the range 0.2624 (3) to 0.26298 (9). Their compositions show they are very close to the chromite end-member FeCr2O4 with limited Al and Mg content. Titanium oxide content exceeds 1 wt.%, whereas the amount of Fe3+ is negligible. Extraterrestrial chromite is distinguished readily from terrestrial analogues on the basis of the cell edge and oxygen positional parameter. These distinctions will facilitate ongoing attempts to reconstruct the palaeoflux of meteorites to Earth from resistant extraterrestrial spinel grains recovered... (More)
- We report the first crystal-structure determinations of chromites from an acapulcoite and from ordinary chondrites. Cell edges range from 8.3212 (3) to 8.3501 (1) angstrom, while the oxygen positional parameters are in the range 0.2624 (3) to 0.26298 (9). Their compositions show they are very close to the chromite end-member FeCr2O4 with limited Al and Mg content. Titanium oxide content exceeds 1 wt.%, whereas the amount of Fe3+ is negligible. Extraterrestrial chromite is distinguished readily from terrestrial analogues on the basis of the cell edge and oxygen positional parameter. These distinctions will facilitate ongoing attempts to reconstruct the palaeoflux of meteorites to Earth from resistant extraterrestrial spinel grains recovered from ancient sediments. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/8398071
- author
- Lenaz, Davide ; Princivalle, Francesco and Schmitz, Birger LU
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- meteorite flux, diffraction, single-crystal X-ray, ordinary chondrite, acapulcoite, chromite
- in
- Mineralogical Magazine
- volume
- 79
- issue
- 3
- pages
- 755 - 765
- publisher
- Mineralogical Society of Great Britain and Ireland
- external identifiers
-
- wos:000364195000016
- scopus:84942111747
- ISSN
- 0026-461X
- DOI
- 10.1180/minmag.2015.079.3.17
- language
- English
- LU publication?
- yes
- id
- dbc05039-b5e6-49a5-8f23-a5891fd8095a (old id 8398071)
- date added to LUP
- 2016-04-01 10:37:24
- date last changed
- 2023-02-21 09:36:04
@article{dbc05039-b5e6-49a5-8f23-a5891fd8095a,
abstract = {{We report the first crystal-structure determinations of chromites from an acapulcoite and from ordinary chondrites. Cell edges range from 8.3212 (3) to 8.3501 (1) angstrom, while the oxygen positional parameters are in the range 0.2624 (3) to 0.26298 (9). Their compositions show they are very close to the chromite end-member FeCr2O4 with limited Al and Mg content. Titanium oxide content exceeds 1 wt.%, whereas the amount of Fe3+ is negligible. Extraterrestrial chromite is distinguished readily from terrestrial analogues on the basis of the cell edge and oxygen positional parameter. These distinctions will facilitate ongoing attempts to reconstruct the palaeoflux of meteorites to Earth from resistant extraterrestrial spinel grains recovered from ancient sediments.}},
author = {{Lenaz, Davide and Princivalle, Francesco and Schmitz, Birger}},
issn = {{0026-461X}},
keywords = {{meteorite flux; diffraction; single-crystal X-ray; ordinary chondrite; acapulcoite; chromite}},
language = {{eng}},
number = {{3}},
pages = {{755--765}},
publisher = {{Mineralogical Society of Great Britain and Ireland}},
series = {{Mineralogical Magazine}},
title = {{First crystal-structure determination of chromites from an acapulcoite and ordinary chondrites}},
url = {{http://dx.doi.org/10.1180/minmag.2015.079.3.17}},
doi = {{10.1180/minmag.2015.079.3.17}},
volume = {{79}},
year = {{2015}},
}