Kuyini i-Rare Metal?
Eminyakeni embalwa edlule, sivame ukuzwa “ngenkinga yensimbi engavamile” noma “inkinga yensimbi engavamile”. Igama elithi, “insimbi engavamile”, alichazwa ngokwezemfundo, futhi akukho ukuvumelana ngokuthi liphathelene nesiphi isakhi. Muva nje, leli gama livame ukusetshenziswa ukubhekisela ezintweni zensimbi ezingu-47 eziboniswe kuMfanekiso 1, ngokusho kwencazelo ebekwe ngokujwayelekile. Ngezinye izikhathi, izinto ezingu-17 zomhlaba ezingavamile zibalwa njengohlobo olulodwa, kanti isamba sibalwa njengo-31. Kunezakhi ezingu-89 ezikhona emhlabeni wemvelo, ngakho-ke, kungashiwo ukuthi ngaphezu kwengxenye yezinto ziyizinsimbi ezingavamile.
Izinto ezifana ne-titanium, i-manganese, i-chromium, ezitholakala ngobuningi eqhweni lomhlaba, nazo zibhekwa njengezinsimbi ezingavamile. Lokhu kungenxa yokuthi i-manganese ne-chromium bezilokhu ziyizinto ezibalulekile emhlabeni wezimboni kusukela ezinsukwini zalo zokuqala, ezisetshenziswa njengezithasiselo zokuthuthukisa izakhiwo zensimbi. I-Titanium ibhekwa “njengengavamile” ngoba iyinsimbi enzima ukuyikhiqiza njengoba ubuchwepheshe obuphezulu buyadingeka ekucwengisiseni i-ore eningi ngesimo se-titanium oxide. Ngakolunye uhlangothi, kusukela ezimweni zomlando, igolide nesiliva, ebezikhona kusukela ezikhathini zasendulo, azibizwa ngokuthi izinsimbi ezingavamile. Kusukela ezimweni zomlando, igolide nesiliva, ebezikhona kusukela ezikhathini zasendulo, azibizwa ngokuthi izinsimbi ezingavamile.
