Tantalum ndi chinthu chamankhwala chokhala ndi chizindikiro cha Ta ndi nambala ya atomiki 73. Poyamba inkadziwika kuti tantalium, dzina lake likuchokera ku Tantalus, woipa wochokera ku nthano zachi Greek. Tantalum ndi chitsulo chosowa, cholimba, chotuwa chabuluu, chonyezimira chomwe sichichita dzimbiri. Ndilo gawo la gulu lazitsulo la refractory, lomwe limagwiritsidwa ntchito kwambiri ngati tinthu tating'onoting'ono tating'onoting'ono. Kusakhazikika kwamankhwala kwa tantalum kumapangitsa kukhala chinthu chofunikira pazida za labotale komanso m'malo mwa platinamu. Ntchito yake yayikulu masiku ano ndi tantalum capacitors mu zida zamagetsi monga mafoni am'manja, osewera ma DVD, machitidwe amasewera apakanema ndi makompyuta. Tantalum, nthawi zonse pamodzi ndi niobium yofanana ndi mankhwala, imapezeka m'magulu a mchere tantalite, columbite ndi coltan (kusakaniza kwa columbite ndi tantalite, ngakhale kuti sikudziwika ngati mtundu wina wa mchere). Tantalum imawonedwa ngati chinthu chofunikira kwambiri paukadaulo.

Thupi katundu
Tantalum ndi mdima (buluu-imvi), wandiweyani, wodumphira, wolimba kwambiri, wopangidwa mosavuta, ndipo umapangitsa kutentha ndi magetsi kwambiri. Chitsulocho chimadziwika chifukwa chokana dzimbiri ndi zidulo; kwenikweni, pa kutentha m'munsimu 150 °C tantalum pafupifupi kwathunthu chitetezo kuukira ndi kawirikawiri aukali aqua regia. Ikhoza kusungunuka ndi hydrofluoric acid kapena njira za acidic zomwe zili ndi ion fluoride ndi sulfure trioxide, komanso ndi yankho la potaziyamu hydroxide. Malo osungunuka a Tantalum a 3017 °C (malo otentha 5458 °C) amapyola pakati pa maelementi okha ndi tungsten, rhenium ndi osmium ya zitsulo, ndi carbon.

Tantalum ilipo mu magawo awiri a crystalline, alpha ndi beta. Gawo la alpha ndi losavuta komanso lofewa; Ili ndi mawonekedwe a cubic okhazikika pathupi (gulu la danga la Im3m, lattice constant a = 0.33058 nm), Knoop hardness 200–400 HN ndi resistivity yamagetsi 15–60 µΩ⋅cm. Gawo la beta ndi lolimba komanso lolimba; crystal symmetry ndi tetragonal (space group P42/mnm, a = 1.0194 nm, c = 0.5313 nm), Knoop hardness ndi 1000–1300 HN ndipo resistivity yamagetsi imakhala yokwera kwambiri pa 170–210 µΩ⋅cm. Gawo la beta ndi losinthika ndipo limasinthidwa kukhala gawo la alpha likatenthedwa kufika 750-775 ° C. Bulk tantalum ndi pafupifupi gawo lonse la alpha, ndipo gawo la beta nthawi zambiri limakhala ngati makanema oonda omwe amapezedwa ndi magnetron sputtering, kuyika kwa nthunzi wamankhwala kapena kuyika kwa electrochemical kuchokera mumchere wosungunuka wa eutectic.