Sinadarin sinadarai ne mai alamar sinadarai Ni da lambar atomic 28. Farar ƙarfe ce mai sheƙi mai launin azurfa mai launin zinare a cikin launin farin azurfa. Nickel ƙarfe ne mai canzawa, mai tauri da kuma ductile. Ayyukan sinadarai na nickel mai tsarki yana da yawa, kuma ana iya ganin wannan aikin a yanayin foda inda aka ƙara girman yankin saman amsawa, amma babban ƙarfen nickel yana amsawa a hankali tare da iskar da ke kewaye saboda wani Layer na oxide mai kariya ya samo asali a saman. Duk da haka, saboda yawan aiki tsakanin nickel da oxygen, har yanzu yana da wuya a sami nickel na ƙarfe na halitta a saman duniya. Nickel na halitta a saman duniya yana cikin manyan meteorites na nickel-iron, saboda meteorites ba su da damar samun iskar oxygen lokacin da suke sararin samaniya. A Duniya, wannan nickel na halitta koyaushe ana haɗa shi da ƙarfe, yana nuna cewa su ne manyan samfuran ƙarshen nucleosynthesis na supernova. Gabaɗaya ana tsammanin cewa tsakiyar duniya ya ƙunshi cakuda nickel-iron.
Amfani da nickel (haɗin nickel-ƙarfe na halitta) ya samo asali ne tun daga shekara ta 3500 kafin haihuwar Annabi Isa (AS). Axel Frederick Kronstedt shine farkon wanda ya ware nickel kuma ya ayyana shi a matsayin sinadari a cikin 1751, kodayake da farko ya yi kuskuren ɗaukar nickel ma'adinin jan ƙarfe. Sunan nickel na ƙasashen waje ya fito ne daga goblin mara kyau mai suna iri ɗaya a cikin tatsuniyar masu hakar ma'adinai na Jamus (Nickel, wanda yayi kama da laƙabin "Old Nick" na shaidan a Turanci). . Tushen nickel mafi arha shine limonite na ƙarfe, wanda gabaɗaya ya ƙunshi 1-2% nickel. Sauran ma'adanai masu mahimmanci don nickel sun haɗa da pentlandite da pentlandite. Manyan masu samar da nickel sun haɗa da yankin Soderbury a Kanada (wanda gabaɗaya ake kyautata zaton shine ramin tasirin meteorite), New Caledonia a Tekun Pacific, da Norilsk a Rasha.
Saboda nickel yana narkewa a hankali a yanayin zafi na ɗaki, gabaɗaya ana ɗaukarsa a matsayin mai jure tsatsa. Saboda haka, a tarihi ana amfani da nickel don yin fenti a saman abubuwa daban-daban, kamar ƙarfe (kamar ƙarfe da tagulla), cikin kayan aikin sinadarai, da wasu ƙarfe waɗanda ke buƙatar kiyaye launin azurfa mai sheƙi (kamar azurfar nickel). Kusan kashi 6% na samar da nickel a duniya har yanzu ana amfani da shi don yin fenti mai tsabta wanda ke jure tsatsa. Nickel ya kasance wani abu gama gari a cikin tsabar kuɗi, amma wannan galibi an maye gurbinsa da ƙarfe mai rahusa, ba ƙaramin abu ba ne saboda wasu mutane suna da rashin lafiyar fata ga nickel. Duk da haka, Burtaniya ta sake fara haƙa tsabar kuɗi a cikin nickel a cikin 2012, saboda ƙin amincewar likitocin fata.
Nickel yana ɗaya daga cikin abubuwa huɗu kacal da ke da ferromagnetic a zafin ɗaki. Magnets na dindindin na alnico masu ɗauke da nickel suna da ƙarfin maganadisu tsakanin maganadisu na dindindin masu ɗauke da ƙarfe da maganadisu na ƙasa mai wuya. Matsayin Nickel a duniyar zamani ya fi yawa saboda nau'ikan ƙarfe daban-daban. Kimanin kashi 60% na samar da nickel a duniya ana amfani da shi don samar da nau'ikan ƙarfe daban-daban na nickel (musamman bakin ƙarfe). Sauran ƙarfe na gama gari, da kuma wasu sabbin ƙarfe masu ƙarfi, suna da kusan dukkan sauran amfani da nickel a duniya. Amfanin sinadarai don sanya mahaɗan su zama ƙasa da kashi 3 cikin ɗari na samar da nickel. A matsayin mahaɗi, nickel yana da takamaiman amfani da yawa a cikin kera sinadarai, misali azaman mai haɓaka amsawar hydrogenation. Enzymes na wasu ƙananan halittu da tsire-tsire suna amfani da nickel azaman wurin aiki, don haka nickel muhimmin sinadari ne a gare su. [1]