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Nefelin

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 …