Korund (nem. korund; qadimgi hindchadan) \u2014 oksidlar kichik sinfi- ga mansub mineral. Kimyoviy formula- si A12O3, qo’shimchalari Cr, Fe, TI va b. Kristallari trigonal singoniyali ustunsimon, kam hollarda dipiramidal. Rangsiz, tarkibida temir, mis, marga- nes, titan va sh.k. elementlarning borli- giga qarab turli rangda bo’ladi. Olmos- Simon yaltiroq. Qattiqligi 9. Zichligi 4000 kg\/m3. K.ning (60-70%) magnetit, gematit shpinel b-n aralashmasi “na- jdak” deb ataladi (Naksos o., Gresiya). Metamorfik, metasomatik jarayonlarda hosil bo’ladi. Kanada, JAR, Qozog’iston (Semiz-bug’), Xibin va Ilmen tog’lari (RF) va O’zbekistonning Oqtosh, mol- guzar, Tomdi tog’larida K. konlari bor. K.ning faqat sochmalardan olinadigan shaffof va chiroyli ranglilari (sap- fir \u2014 ko’k rangli, yoqut \u2014 qizil rangli) qimmatbaho tosh sifatida zargarlikda ishlatiladi, unchalik toza bo’lmaganlari abraziv material. Texnik va zargarlik maqsadlarida ishlatish uchun sanoat miqyosida sun’iy K. olinadi. Cr2+, Fe3+ qo’shib olingan sun’iy K. kvant elektro- nikasi, soatsozlik, zargarlik sanoati va b.da ishlatiladi. Qo’shimchalarsiz olin- gan sun’iy K. radioelektronika sanoa- tida qo’llaniladi. Sun’iy K. tozaligi va yirikligi b-n tabiiy K.dan aniq, ajra- lib turadi.<\/p>\n","protected":false},"excerpt":{"rendered":"
Korund (nem. korund; qadimgi hindchadan) \u2014 oksidlar kichik sinfi- ga mansub mineral. Kimyoviy formula- si A12O3, qo’shimchalari Cr, Fe, TI va b. Kristallari trigonal singoniyali ustunsimon, kam hollarda dipiramidal. Rangsiz, … Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":99837,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[201],"tags":[],"class_list":["post-128717","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-k-harfi","entry"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"kr","enabled_languages":["uz","kr","ru"],"languages":{"uz":{"title":true,"content":true,"excerpt":false},"kr":{"title":false,"content":false,"excerpt":false},"ru":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts\/128717","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/comments?post=128717"}],"version-history":[{"count":1,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts\/128717\/revisions"}],"predecessor-version":[{"id":128724,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts\/128717\/revisions\/128724"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/media\/99837"}],"wp:attachment":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/media?parent=128717"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/categories?post=128717"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/tags?post=128717"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}