Manganese

Manganese yog cov khoom siv tshuaj nrog lub cim Mn, atomic tooj 25, thiab txheeb ze atomic mass 54.9380, yog grey dawb, tawv, nkig, thiab glossy hloov hlau. Tus txheeb ze ntom ntom yog 7.21g / cm3³ (ib., 20℃). Melting point 1244℃2095, ib℃. Lub resistivity yog 185 × 10Ω·m (25℃).

Manganese yog ib qho nyuaj thiab nkig nyiaj dawb hlau nrog lub cubic lossis tetragonal crystal system. Tus txheeb ze ntom ntom yog 7.21g / cm³ (a, 20 ℃). Melting point 1244 ℃, boiling point 2095 ℃. Lub resistivity yog 185 × 10 Ω· m (25 ℃). Manganese yog cov hlau reactive uas kub hnyiab hauv oxygen, oxidizes ntawm nws saum npoo hauv huab cua, thiab tuaj yeem sib txuas ncaj qha nrog halogens los ua halides.

Manganese tsis muaj nyob rau hauv ib qho chaw, tab sis manganese ore muaj nyob rau hauv daim ntawv ntawm oxides, silicates, thiab carbonates. Manganese ore feem ntau yog muab faib rau hauv Australia, Brazil, Gabon, Is Nrias teb, Russia, thiab South Africa. Cov manganese nodules ntawm lub ntiaj teb dej hiav txwv muaj kwv yees li 24% manganese. Cov peev txheej ntawm manganese ore peev hauv Africa yog 14 billion tons, suav txog 67% ntawm lub ntiaj teb reserves.Tuam Tshoj muaj ntau manganese ore peev txheej, uas tau nthuav dav thiab tsim tawm hauv 21 lub xeev (cov cheeb tsam) thoob plaws lub tebchaws..