LINK<\/strong><\/a><\/p>\n\n\n\n“Highlights<\/p>\n\n\n\n
\u2022 Raman spectra of orthopyroxene in Kemer L4 indicate 13\u201320\u202fmol% of ferrosilite.
\u2022 Kemer L4 ZFC curve shows two magnetic phase transitions for chromite at 62 and 52\u202fK.
\u2022 Fe2+ occupancies of the M1 and M2 sites in silicates agree for XRD and M\u00f6ssbauer data.”<\/p>\n\n\n\n
“The bulk interior of Kemer L4 ordinary chondrite was characterized for the first time by means of optical spectroscopy, scanning electron microscopy with energy dispersive spectroscopy, Raman spectroscopy, X-ray diffraction, magnetization measurements and M\u00f6ssbauer spectroscopy with a high velocity resolution. The main and minor iron bearing phases were found as well as ferrihydrite as a result of weathering. The Fe2+ partitioning among the M1 and M2 sites in olivine, orthopyroxene and clinopyroxene was determined from the X-ray diffraction. The ratios of Fe2+ occupancies for these crystals were estimated from both X-ray diffraction and M\u00f6ssbauer spectroscopy data and appeared to be in a good agreement. The distribution coefficients KD and the temperatures of equilibrium cation distribution Teq were also evaluated for olivine and orthopyroxene from two independent techniques and were in a good consistence: KD\u202f=\u202f1.77, Teq\u202f=\u202f441\u202fK (X-ray diffraction) and KD\u202f=\u202f1.77, Teq\u202f=\u202f439\u202fK (M\u00f6ssbauer spectroscopy) for olivine and KD\u202f=\u202f0.10, Teq\u202f=\u202f806\u202fK (X-ray diffraction) and KD\u202f=\u202f0.09, Teq\u202f=\u202f787\u202fK (M\u00f6ssbauer spectroscopy) for orthopyroxene. The fusion crust of Kemer L4 was studied using X-ray diffraction, magnetization measurements and M\u00f6ssbauer spectroscopy. Magnesioferrite and probably maghemite were found in the fusion crust in addition to other phases observed in the bulk interior.”<\/p>\n","protected":false},"excerpt":{"rendered":"
A. A. Maksimova, E. V. Petrova, A. V. Chukin, M. S. Karabanalov, B.A. Nogueira, R. Fausto, M. Yesiltas, I. Felner, M. I. Oshtrakh Spectrochimica Acta Part A: Molecular and Biomolecular SpectroscopyAvailable online 20 July 2020,…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,7,47],"tags":[595,1807,264,2693],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/22683"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=22683"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/22683\/revisions"}],"predecessor-version":[{"id":22684,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/22683\/revisions\/22684"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=22683"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=22683"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=22683"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}