{"id":120,"date":"2024-04-04T06:11:46","date_gmt":"2024-04-04T03:11:46","guid":{"rendered":"https:\/\/sisu.ut.ee\/mineraalid-ja-kivimid\/p2evakivid\/"},"modified":"2024-04-04T06:13:02","modified_gmt":"2024-04-04T03:13:02","slug":"p2evakivid","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/mineraalid-ja-kivimid\/p2evakivid\/","title":{"rendered":"P\u00e4evakivid"},"content":{"rendered":"

\n\tP\u00e4evakivid<\/b>\u00a0on keemiliselt koostiselt kaaliumi v\u00f5i naatriumi ja kaltsiumi alumosilikaadid.\u00a0<\/font><\/font>Kaaliump\u00e4evakivi<\/a>\u00a0t\u00fc\u00fcpilisim esindaja on\u00a0<\/font><\/font>ortoklass<\/a>, naatrium-kaltsiump\u00e4evakive nimetatakse\u00a0<\/font><\/font>plagioklassideks<\/a>.<\/font><\/font>\n<\/p>\n

\n\tP\u00e4evakivid on\u00a0maakoore levinuim mineraalir\u00fchm<\/b>, moodustades keskmiselt 65% kivimite koostisest. Neid leidub peaaegu k\u00f5igis tard- ja moondekivimeis, eriti aga\u00a0<\/font>graniidis<\/a>,\u00a0<\/font>dioriidis<\/a>,\u00a0<\/font>gneisis<\/a>\u00a0ja\u00a0<\/font>pegmatiidis<\/a>.<\/font>\n<\/p>\n

\n\tEestis<\/b>\u00a0on suuri p\u00e4evakivikristalle k\u00f5ige lihtsam leida pegmatiitsetest r\u00e4ndkividest ja rabakividest. Enamasti on tegu kaaliump\u00e4evakiviga, mille pruunid, punakaspruunid v\u00f5i roosakad kristallid on kivimis kergesti tuntavad l\u00f5ikivate l\u00f5henevuspindade j\u00e4rgi.<\/font>\n<\/p>\n

\n\tP\u00e4evakivid murenevad m\u00e4rksa kiiremini kui kvarts, seet\u00f5ttu on murendis ja liivas p\u00e4evakive tunduvalt v\u00e4hem kui kvartsi. P\u00e4evakivide l\u00f5pliku murenemise saadus on kaoliinsavi.<\/font>\n<\/p>\n

\n\t\"olioglass\"
Foto 1. P\u00e4evakivide (plagioklassi) r\u00fchma kuuluv oligoklass<\/font>\n<\/p>\n

\n\t
Koostanud ja fotografeerinud \u00a9 2003 Mare Isakar<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

P\u00e4evakivid\u00a0on keemiliselt koostiselt kaaliumi v\u00f5i naatriumi ja kaltsiumi alumosilikaadid.\u00a0Kaaliump\u00e4evakivi\u00a0t\u00fc\u00fcpilisim esindaja on\u00a0ortoklass, naatrium-kaltsiump\u00e4evakive nimetatakse\u00a0plagioklassideks. P\u00e4evakivid on\u00a0maakoore levinuim mineraalir\u00fchm, moodustades keskmiselt 65% kivimite koostisest. Neid leidub peaaegu k\u00f5igis tard- ja moondekivimeis, eriti aga\u00a0graniidis,\u00a0dioriidis,\u00a0gneisis\u00a0ja\u00a0pegmatiidis. Eestis\u00a0on suuri p\u00e4evakivikristalle k\u00f5ige lihtsam leida pegmatiitsetest r\u00e4ndkividest ja …<\/p>\n","protected":false},"author":226,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-120","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/sisu.ut.ee\/mineraalid-ja-kivimid\/wp-json\/wp\/v2\/pages\/120","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sisu.ut.ee\/mineraalid-ja-kivimid\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sisu.ut.ee\/mineraalid-ja-kivimid\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sisu.ut.ee\/mineraalid-ja-kivimid\/wp-json\/wp\/v2\/users\/226"}],"replies":[{"embeddable":true,"href":"https:\/\/sisu.ut.ee\/mineraalid-ja-kivimid\/wp-json\/wp\/v2\/comments?post=120"}],"version-history":[{"count":1,"href":"https:\/\/sisu.ut.ee\/mineraalid-ja-kivimid\/wp-json\/wp\/v2\/pages\/120\/revisions"}],"predecessor-version":[{"id":724,"href":"https:\/\/sisu.ut.ee\/mineraalid-ja-kivimid\/wp-json\/wp\/v2\/pages\/120\/revisions\/724"}],"wp:attachment":[{"href":"https:\/\/sisu.ut.ee\/mineraalid-ja-kivimid\/wp-json\/wp\/v2\/media?parent=120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}