LINK<\/strong><\/a><\/p>\n“Cathodoluminescence (CL) analyses were carried out on maskelynite and lingunite in L6 chondrites of Tenham and Yamato\u2010790729. Under CL microscopy, bright blue emission was observed in Na\u2010lingunite in the shock veins. Dull blue\u2010emitting maskelynite is adjacent to the shock veins, and aqua blue luminescent plagioclase lies farther away. CL spectroscopy of the Na\u2010lingunite showed emission bands centered at ~330, 360\u2013380, and ~590 nm. CL spectra of maskelynite consisted of emission bands at ~330 and ~380 nm. Only an emission band at 420 nm was recognized in crystalline plagioclase. Deconvolution of CL spectra from maskelynite successfully separated the UV\u2013blue emission bands into Gaussian components at 3.88, 3.26, and 2.95 eV. For comparison, we prepared K\u2010lingunite and experimentally shock\u2010recovered feldspars at the known shock pressures of 11.1\u201341.2 GPa to measure CL spectra. Synthetic K\u2010lingunite has similar UV\u2013blue and characteristic yellow bands at ~550, ~660, ~720, ~750, and ~770 nm. The UV\u2013blue emissions of shock\u2010recovered feldspars and the diaplectic feldspar glasses show a good correlation between intensity and shock pressure after deconvolution. They may be assigned to pressure\u2010induced defects in Si and Al octahedra and tetrahedra. The components at 3.88 and 3.26 eV were detectable in the lingunite, both of which may be caused by the defects in Si and Al octahedra, the same as maskelynite. CL of maskelynite and lingunite may be applicable to estimate shock pressure for feldspar\u2010bearing meteorites, impactites, and samples returned by spacecraft mission, although we need to develop more as a reliable shock barometer.”<\/p>\n","protected":false},"excerpt":{"rendered":"
Masahiro Kayama, Toshimori Sekine, Naotaka Tomioka, Hirotsugu Nishido, Yukako Kato, Kiyotaka Ninagawa, Takamichi Kobayashi, Akira Yamaguchi Meteorit Planet Sci. . doi:10.1111\/maps.13092 LINK “Cathodoluminescence (CL) analyses were carried out on maskelynite and lingunite in L6 chondrites…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,7,63],"tags":[1242,1002,1815,3169,987,1807,314,2656,4484],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/14648"}],"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=14648"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/14648\/revisions"}],"predecessor-version":[{"id":14649,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/14648\/revisions\/14649"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14648"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14648"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14648"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}