LINK<\/strong><\/a><\/p>\n\n\n\n“Ordinary chondrites preserve important information on the mineralogical and phase evolution as well as thermal metamorphism of their parent bodies. Quantitative characterization of minerals\/phases and cation distributions in silicates using complementary analytical techniques provides valuable constraints on their crystal chemistry and thermal history. In this study, we investigate the Northwest Africa (NWA) 6410 L6 ordinary chondrite using optical microscopy, scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and 57Fe M\u00f6ssbauer spectroscopy. Optical microscopy revealed significant porosity of the polished section together with abundant chondrules and chondrule relics. The mineralogical\/phase composition and crystal chemistry of the meteorite were characterized by SEM, EDS, XRD, and M\u00f6ssbauer spectroscopy. XRD identified the major mineral phases, whereas M\u00f6ssbauer spectroscopy resolved the Fe-bearing mineral\/phase compounds and the distribution of Fe2+ between the M1 and M2 crystallographic sites in olivine and orthopyroxene. The occupancies of Fe2+ and Mg2+ at the M1 and M2 sites were determined from XRD refinements, while the ratios of Fe2+ site populations in silicates were derived from M\u00f6ssbauer spectra. The Fe2+ M1\/M2 site-occupancy ratios obtained independently by XRD and M\u00f6ssbauer spectroscopy are in good agreement, demonstrating the consistency of the two approaches. The temperatures of cation equilibrium distribution calculated from XRD and M\u00f6ssbauer spectroscopy are 570 and 626\u2009K, respectively, for olivine and 679 and 686\u2009K, respectively, for orthopyroxene. Classification based on the relative spectral areas (roughly the relative Fe fractions) of characteristic M\u00f6ssbauer components confirms that NWA 6410 belongs to the L group of ordinary chondrites.”<\/p>\n","protected":false},"excerpt":{"rendered":"
A. A. Maksimova, E. V. Petrova, A. V. Chukin, G. Varga, Z. Dankh\u00e1zi, M. Gritsevich, E. Kuzmann, Z. Homonnay, M. I. Oshtrakh MAPS, Version of Record online: 01 November 2026 LINK “Ordinary chondrites preserve important…<\/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],"tags":[103,595,7325,1807,1486,2693],"class_list":["post-42746","post","type-post","status-publish","format-standard","hentry","category-l","category-chondrite","tag-l6","tag-mossbauer-spectroscopy","tag-nwa-6410","tag-chondrite","tag-x-ray-diffraction","tag-x-ray-diffraction-xrd"],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/42746","targetHints":{"allow":["GET"]}}],"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=42746"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/42746\/revisions"}],"predecessor-version":[{"id":42747,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/42746\/revisions\/42747"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=42746"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=42746"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=42746"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}