LINK<\/strong><\/a><\/p>\n\n\n\n“Highlights<\/p>\n\n\n\n
\u2022 Raman spectroscopy detected higher contents of forsterite and enstatite in Bjurb\u00f6le.
\u2022 The saturation magnetic moment for Bjurb\u00f6le is \u223c7 emu\/g.
\u2022 Fe2+ occupancies of M1 and M2 sites are determined by XRD and M\u00f6ssbauer spectroscopy.”<\/p>\n\n\n\n
“Bjurb\u00f6le L\/LL4 ordinary chondrite was studied using scanning electron microscopy with energy dispersive spectroscopy, Raman spectroscopy, X-ray diffraction, magnetization measurements and M\u00f6ssbauer spectroscopy. The phase composition and the relative iron fractions in the iron-bearing phases were determined. The unit cell parameters for olivine, orthopyroxene and clinopyroxene are similar to those observed in the other ordinary chondrites. The higher contents of forsterite and enstatite were detected by Raman spectroscopy. Magnetization measurements showed that the temperature of the ferrimagnetic-paramagnetic phase transition in chromite is around 57 K and the saturation magnetic moment is \u223c7 emu\/g. The values of the 57Fe hyperfine parameters for all components in the Bjurb\u00f6le M\u00f6ssbauer spectrum were determined and related to the corresponding iron-bearing phases. The relative iron fractions in Bjurb\u00f6le and the 57Fe hyperfine parameters of olivine, orthopyroxene and troilite were compared with the data obtained for the selected L and LL ordinary chondrites. The Fe2+ occupancies of the M1 and M2 sites in silicate crystals were determined using both X-ray diffraction and M\u00f6ssbauer spectroscopy. Then, the temperatures of equilibrium cation distribution were determined, using two independent techniques, for olivine as 666 K and 850 K, respectively, and for orthopyroxene as 958 K and 1136 K, respectively. Implications of X-ray diffraction, magnetization measurements and M\u00f6ssbauer spectroscopy data for the classification of the studied Bjurb\u00f6le material indicate its composition being close to the LL group of ordinary chondrites.”<\/p>\n","protected":false},"excerpt":{"rendered":"
A. A. Maksimova, E. V. Petrova, A.V. Chukin, B.A. Nogueira, R. Fausto, \u00c1. Szab\u00f3, Z. Dankh\u00e1zi, I. Felner, M. Gritsevich, T.Kohout, E. Kuzmann, Z. Homonnay, M. I. Oshtrakh Spectrochimica Acta Part A: Molecular and Biomolecular…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,24,7],"tags":[1622,595,264,2693],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/25315"}],"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=25315"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/25315\/revisions"}],"predecessor-version":[{"id":25316,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/25315\/revisions\/25316"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=25315"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25315"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25315"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}