{"id":13146,"date":"2017-07-03T09:04:32","date_gmt":"2017-07-03T07:04:32","guid":{"rendered":"http:\/\/karmaka.de\/?p=13146"},"modified":"2017-07-03T09:04:32","modified_gmt":"2017-07-03T07:04:32","slug":"determination-of-the-equilibrium-fo2-in-bulk-samples-of-h-l-and-ll-ordinary-chondrites-by-solid-state-electrochemistry","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=13146","title":{"rendered":"Determination of the equilibrium fO2 in bulk samples of H, L, and LL ordinary chondrites by solid-state electrochemistry"},"content":{"rendered":"<p>Osadchii, V. O., Fedkin, M. V. and Osadchii, E. G.<\/p>\n<p>Meteoritics &#038; Planetary Science. doi: 10.1111\/maps.12919<\/p>\n<p><a href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.12919\/abstract\" target=\"_blank\"><strong>LINK<\/strong><\/a><\/p>\n<p>&#8220;High-temperature solid-state electrochemistry techniques (EMF method) were used to measure the oxygen fugacity (fO2) of the ordinary chondrites Ochansk (H4), Savtschenskoje (LL4), Elenovka (L5), Vengerovo (H5), and Kharkov (L6). The fO2 results are presented in the form of the following equations:<\/p>\n<p><a href=\"http:\/\/karmaka.de\/wp-content\/uploads\/2017\/07\/logs.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/karmaka.de\/wp-content\/uploads\/2017\/07\/logs.jpg\" alt=\"\" width=\"1200\" height=\"371\" class=\"alignleft size-full wp-image-13147\" srcset=\"https:\/\/karmaka.de\/wp-content\/uploads\/2017\/07\/logs.jpg 1200w, https:\/\/karmaka.de\/wp-content\/uploads\/2017\/07\/logs-300x93.jpg 300w, https:\/\/karmaka.de\/wp-content\/uploads\/2017\/07\/logs-768x237.jpg 768w, https:\/\/karmaka.de\/wp-content\/uploads\/2017\/07\/logs-1024x317.jpg 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/a><\/p>\n<p>It was found that fO2 regularly increases from H chondrites to LL chondrites. Measured fO2 are ~1.5 higher than those previously calculated from mineral assemblages. Kharkov (L6) is a little more oxidized than Elenovka (L5) in agreement with the progressive oxidation model. At the same time, Ochansk (H4) is more oxidized than Vengerovo (H5) and exhibits a slightly different slope compared to other chondrites and at T > 1200 K, becomes more reduced than Kharkov (L6) or Elenovka (L5). Measured oxygen fugacity values of meteorites fall within (0.1\u20131.0)\u00b7log fO2 of one another. The possible explanation of discrepancies between measured and calculated values is discussed.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Osadchii, V. O., Fedkin, M. V. and Osadchii, E. G. Meteoritics &#038; Planetary Science. doi: 10.1111\/maps.12919 LINK &#8220;High-temperature solid-state electrochemistry techniques (EMF method) were used to measure the oxygen fugacity (fO2) of the ordinary chondrites&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,23,24,7],"tags":[3974,1806,3976,1815,1816,3972,1807,2587,3973,3975],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/13146"}],"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=13146"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/13146\/revisions"}],"predecessor-version":[{"id":13148,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/13146\/revisions\/13148"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13146"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13146"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13146"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}