Nefelin (az yun. nephe1e — abr), mineral az sinfi silikatho. Tarkibi khimiyaviash KNa3[AlSiO4]4. Odatay dar tarkibash khele bisyor silitciy va chun omekhta kalsiy, magniy, bazan ohan, berilliy, khlor, ob, galliy ham dorad. Sistemai kristallbandiash geksagonali. Agregathoi yaklukhti donador, bazan kristallhoi kutohi priamamonand hosil menamoyad. Berang, gulobirang, khokistarrang yo sabzrang meshavad. Sakhtnash 5,5—6; zichiash 2550—2650 kg,/m3. Nefelin yake az mineralhoi asosii jinshoi kuhii ishqori — sienithoi nefelindor va pegmatithoi onho meboshad. Konhoi kaloni Nefelin dar SSSR dar nimjazirai Kola, k. Ilmeni Ural, kishvari Krasnoyar, qatorkuhi Oloy mavjudand. Az Nefelin alyuminiy megirand, soda va mahsuloti digar tayyor mekunand. Dar istehsoli shisha va silikagel ba kor mebarand. Dar khochagii qishloq hamchun nuri istifoda meshavad.
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SATHI VINTI
SATHI VINTI, sathest, ki khati £ hangomi dar girdi mehvari nojunboni OO’ bo surati kunjii …