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MONASIT

monacitMONASIT (nem. Monazit, az yun. toqayu — tanho zindagi mekunam), mineral, fosfati elementhoi nodirzamin, mansubi guruhi seriy; tarkibi khimiyaviash (Se, La…) [RO]. Aksar omekhtahoi Th02 (to 10% va bazan ziyodtar), U02 (to 6,6%), ZrOj, SaO, inchunin Si02, S03 va g. dorad. Sistemai kristallbandiash monoklipi. Kristallhoyash plastinka va takhtachamonand buda, dar shakli dona-dona va massahoi donador niz vomekhurad. Rangash zard, zardi bur, chetari, surkh, bazan sabz; jiloyash shishagun. Sakhtiash 5—5,5; zichiash (vobasta ba tarkib) az 4900 to 5500 kg/m3. Doroi khosiyati balandi radioaktivist. Monasit dar pegmatitho, gneysho, raghoi karbonatii gidrotermali va granitu sienithoi ishqori aksar hamrohi shpathoi dashti, sirkon, magnetit, ilmenit va digar mineralho yoft meshavad. Monasitro asosan az konhoi poshkhurdai daryoy va bahri megirand (mas., dar Hinduston, Shri-Lanka, Braziliya). Az Monasit seriy va toriy judo karda megirand.

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