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Agregaat (mineraloogia)

Mineraalne agregaat on looduslikes protsessides tekkinud mineraaliterade kogum.

Agregaadid, mis koostiselt võivad olla nii mono- kui ka polümineraalsed, jaotatakse morfoloogiliste tunnuste põhjal mitmesse tüüpi. Levinuimaks agregaatide tüübiks on teralised agregaadid, mis koosnevad üksteisega juhuslikult kokku kasvanud, väga erineva täiuslikkusega väljakujunenud kristallide teradest. Teraliste agregaatidena esinevad paljud tardkivimid ja maavarad.

Sageli annab agregaati moodustavate terade kuju sellele veel täiendava ilme. Plaadikujulistest mineraalide teradest koosnevat agregaati nimetatakse lehtjaks või soomuseliseks, piklikest teradest koosnevat agregaati teibaliseks, nõeljaks või kiuliseks jne.[1]

  1. K. Ojaste, A. Reier, K. Mens, "Kristallograafia mineraloogia petrograafia", Eesti Riiklik Kirjastus, Tallinn 1964, 462 lk; lk 193.
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Agregaat (mineraloogia)
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