Menene Rare Metal?
A cikin 'yan shekarun nan, muna yawan jin labarin "matsalar ƙarfe mai wuya" ko "matsalar ƙarfe mai wuya". Kalmar, "ƙarfe mai wuya", ba ta da tushe a fannin ilimi, kuma babu wata yarjejeniya kan abin da ya shafi. Kwanan nan, ana amfani da kalmar sau da yawa don nufin abubuwa 47 na ƙarfe da aka nuna a Hoto na 1, bisa ga ma'anar da aka saita akai-akai. Wani lokaci, ana ƙididdige abubuwa 17 na ƙasa masu wuya a matsayin nau'i ɗaya, kuma jimlar ana ƙididdige su a matsayin 31. Akwai jimillar abubuwa 89 da ke akwai a duniyar halitta, saboda haka, ana iya cewa sama da rabin abubuwan ƙarfe ne masu wuya.
Ana kuma ɗaukar abubuwa kamar titanium, manganese, chromium, waɗanda ake samu a cikin ɓawon ƙasa a matsayin ƙarfe masu wuya. Wannan saboda manganese da chromium sun kasance muhimman abubuwa ga duniyar masana'antu tun farkon zamaninsa, waɗanda ake amfani da su azaman ƙari don haɓaka halayen ƙarfe. Ana ɗaukar titanium a matsayin "marasa wuya" saboda ƙarfe ne mai wahalar samarwa saboda ana buƙatar fasaha mai girma don tace ma'adinan da yawa a cikin nau'in titanium oxide. A gefe guda kuma, daga yanayin tarihi, ba a kiran zinariya da azurfa, waɗanda suke wanzuwa tun zamanin da, ƙarfe masu wuya. Daga yanayin tarihi, ba a kiran zinariya da azurfa, waɗanda suke wanzuwa tun zamanin da, ƙarfe masu wuya.
