{"id":9451,"date":"2016-07-20T18:39:47","date_gmt":"2016-07-20T16:39:47","guid":{"rendered":"http:\/\/karmaka.de\/?p=9451"},"modified":"2016-07-20T18:39:47","modified_gmt":"2016-07-20T16:39:47","slug":"57fe-mossbauer-study-of-the-chainpur-meteorite","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=9451","title":{"rendered":"57Fe M\u00f6ssbauer study of the Chainpur meteorite"},"content":{"rendered":"<p>Nancy N. Elewa, R. Cobas, J. M. Cadogan<\/p>\n<p>Hyperfine Interactions<br \/>\nDecember 2016, 237:107<br \/>\nFirst online: 20 July 2016<\/p>\n<p><a href=\"http:\/\/link.springer.com\/article\/10.1007\/s10751-016-1315-4\" target=\"_blank\"><strong>LINK<\/strong><\/a><\/p>\n<p>&#8220;The Chainpur meteorite is one of 23 ordinary chondrites classified as LL3-type (low-Fe &#038; low-metal). It was observed as a shower of stones falling on May 9, 1907 in Uttar Pradesh, India. We report here the characterization of the Fe-bearing phases in this chondrite using 57Fe M\u00f6ssbauer spectroscopy carried out at 298 K, 120 K, 50 K and 13 K. The paramagnetic doublets of olivine and pyroxene dominate the room temperature spectrum, accounting for around 70 % of the spectral area. Moreover, a doublet present with a spectral area of 5 % and assigned to a superparamagnetic Fe 3+ phase is a consequence of terrestrial weathering. On the basis of the measured 57Fe electric quadrupole splitting of the olivine component at room temperature we estimate the mean Fe:Mg ratio in this meteoritic olivine to be around 35:65 % although there is clearly a wide range of composition. The effects of magnetic ordering of the major components olivine and pyroxene are observed at 13 K.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nancy N. Elewa, R. Cobas, J. M. Cadogan Hyperfine Interactions December 2016, 237:107 First online: 20 July 2016 LINK &#8220;The Chainpur meteorite is one of 23 ordinary chondrites classified as LL3-type (low-Fe &#038; low-metal). It&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24,7,47],"tags":[3073,3071,3072,1816,1047,595,1807],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/9451"}],"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=9451"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/9451\/revisions"}],"predecessor-version":[{"id":9452,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/9451\/revisions\/9452"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9451"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9451"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}