cov khoom

luv luv piav qhia:

Tourmaline hmoov yog cov hmoov tau los ntawm mechanically crushing tus thawj tourmaline ore tom qab tshem tawm impurities.Cov txheej txheem thiab purified tourmaline hmoov muaj ntau dua anion tiam thiab deb infrared emissivity.Tourmaline tseem hu ua Tourmaline.Tourmaline chemical formula yog NaR3Al6Si6O18BO33 (OH, F.).4, Crystal belongs rau trigonal system tsev neeg ntawm cyclic qauv silicate minerals feem ntau.Hauv cov mis, R sawv cev rau cov hlau cation.Thaum R yog Fe2 +, nws tsim ib tug dub siv lead ua tourmaline.Tourmaline crystals yog nyob rau hauv cov duab ntawm ze li ntawm daim duab peb sab kab, nrog cov siv lead ua sib txawv ntawm ob qho kawg.Cov kab ntawv muaj kab txaij ntev, feem ntau nyob rau hauv daim ntawv ntawm kab, koob, radials, thiab loj aggregates.iav gloss, tawg resin gloss, translucent rau pob tshab.Tsis muaj cleavage.Mohs hardness 7-7.5, tshwj xeeb gravity 2.98-3.20.Muaj piezoelectricity thiab pyroelectricity.