Kvars (nem. Quarz) \u2014 silikatlar sinfiga mansub eng ko’p tarqalgan jins hosil qiluvchi mineral. Kimyoviy formu- lasi SiO2. K.ning kristalli 2 ta modi- fikasiyasi ma’lum: geksagonal K. (yoki a-K.) 870-573\u00b0 t-pa oralig’ida turg’un va trigonal K. (R-K.) 573\u00b0 dan pastda turg’un. r-K. tabiatda eng ko’p tarqalgan. Qo’shaloklari ko’p, kristall donacha, agregat va zich massalar holida uchraydi. K.ning kristallari, donalari, agregat- larining rangi har xil: shaffof \u2014 tog’ billuri, binafsha \u2014 ametist (safsar), kulrang \u2014 rauxtopaz, qora \u2014 morion, tillarang \u2014 tsitrin vab. Rangining xar xil bo’lishi strukturaviy defektiga bog’liq. Murakkab ranglilari ham uchray- Di, ularga boshqa minerallarning may- da zarralari qo’shilgan bo’ladi. K. ning yashirin kristall xillari agat va xaltse- don nihoyatda ingichka tolasimon tuzil- malardan iborat. K. optik jihatdan bir o’kli, musbat. Ultrabinafsha va qisman infraqizil nurlarni o’tkazadi. Sun’- iy K.ni SiO2 ning suvli eritmasidan yuqori bosim va t-Rada olinadi. K. tur- li tog’jinslarining asosiy tarkibiy qismi hisoblanadi. K. pezoelektrik xossaga ega. Qattikligi 7. Zichligi 2,65 g\/ sm3. Erish t-rasi 1710\u00b0, soviganda kvars oynasi deb ataluvchi jismga aylanadi. Monokristallari kam uchraydi va juda yuqori baholanadi. K. O’rta Osiyo (Po- mirda), RF (Uralda), Ukraina (Volinda), Braziliya va Madagaskarda uchraydi. K. qumi va uning metamorflashgan turlari \u2014 kvarsitlar keramika va shisha sanoa- tida, monokristallari (pezokvars) op- tika va radiotexnikada, shaffof va chi- royli ranglilari yarim qimmatbaho tosh sifatida zargarlikda ishlatiladi.<\/p>\n","protected":false},"excerpt":{"rendered":"
Kvars (nem. Quarz) \u2014 silikatlar sinfiga mansub eng ko’p tarqalgan jins hosil qiluvchi mineral. Kimyoviy formu- lasi SiO2. K.ning kristalli 2 ta modi- fikasiyasi ma’lum: geksagonal K. (yoki a-K.) 870-573\u00b0 … 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-128493","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-k-harfi","entry"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"ru","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\/ru\/wp-json\/wp\/v2\/posts\/128493","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/comments?post=128493"}],"version-history":[{"count":1,"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/posts\/128493\/revisions"}],"predecessor-version":[{"id":128507,"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/posts\/128493\/revisions\/128507"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/media\/99837"}],"wp:attachment":[{"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/media?parent=128493"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/categories?post=128493"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/tags?post=128493"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}