التفاصيل البيبلوغرافية
| العنوان: |
Study of Bursa L6 ordinary chondrite by X-ray diffraction, magnetization measurements, and Mossbauer spectroscopy |
| المؤلفون: |
Maksimova, Alevtina A., Petrova, Evgeniya V., Chukin, Andrey V., Unsalan, Ozan, Szabo, Abel, Dankhazi, Zoltan, Felner, Israel, Zamyatin, Dmitry A., Kuzmann, Erno, Homonnay, Zoltan, Oshtrakh, Michael I. |
| المصدر: |
METEORITICS & PLANETARY SCIENCE 55(12) 2780-2793 |
| سنة النشر: |
2020 |
| الوصف: |
We report the results of the complex study of the bulk interior of Bursa L6 ordinary chondrite using optical microscopy, scanning electron microscopy with energy dispersive spectroscopy, electron microprobe analysis (EMPA), X-ray diffraction (XRD), magnetization measurements, and Mossbauer spectroscopy. The main and minor iron-bearing phases and their chemical compositions were determined by these techniques. The detected iron-bearing phases in the bulk interior of Bursa L6 are the following: olivine; orthopyroxene; Ca-rich clinopyroxene; troilite; chromite; hercynite; ilmenite; the alpha(2)-Fe(Ni, Co), alpha-Fe(Ni, Co), and gamma-Fe(Ni, Co) phases; and ferrihydrite resulting from meteorite terrestrial weathering. Using the EMPA, the values of fayalite and ferrosilite were obtained as similar to 25.2% and similar to 21.4%, respectively. The unit cell parameters for silicate crystals were determined from XRD, then the Fe2+ and Mg2+ occupations of the M1 and M2 sites in these crystals were estimated. Further calculations of the ratios of the Fe2+ occupancies in the M1 and M2 sites in olivine and orthopyroxene based on XRD and Mossbauer spectroscopy appeared to be in a good agreement. The temperatures of equilibrium cation distributions for olivine and orthopyroxene obtained from these techniques are consistent: 623 K (XRD) and 625 K (Mossbauer spectroscopy) for olivine and 1138 K (XRD) and 1122 K (Mossbauer spectroscopy) for orthopyroxene. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://aperta.ulakbim.gov.tr/record/9915; oai:zenodo.org:9915 |
| الاتاحة: |
https://aperta.ulakbim.gov.tr/record/9915 |
| Rights: |
info:eu-repo/semantics/openAccess ; http://www.opendefinition.org/licenses/cc-by |
| رقم الانضمام: |
edsbas.FDB9DCCB |
| قاعدة البيانات: |
BASE |