Samarij

samarij
Osnovna svojstva

Element
Simbol
Atomski broj
samarij
Sm
62
Kemijska skupina lantanoidi
Grupa, perioda, Blok ?, 6, f
Izgled
Gustoća1 7520 kg/m3
Tvrdoća ?
Specifični toplinski kapacitet (cp ili cV)2

 J mol–1 K–1

Talište 1074[1] °C
Vrelište3 1794[1] °C
Toplina taljenja  kJ mol-1
Toplina isparavanja  kJ mol-1

1 pri standardnom tlaku i temperaturi
2 pri konstantnom tlaku ili volumenu
3 pri standardnom tlaku

Atomska svojstva
Atomska masa 150,36(2)
Elektronska konfiguracija [Xe] 4f66s2[1]

Samarij je kemijski element atomskog (rednog) broja 62 i atomske mase 150,36(2). U periodnom sustavu elemenata predstavlja ga simbol Sm.

Samarij je 1879. godine otkrio Paul Emile Lecoq de Boisbaudran (Francuska). Ime je dobio po mineralu samarskitu nazvanom tako u čast ruskog rudarskog inženjera Samarskog. To je srebrno bijeli metal koji je stabilan na suhom zraku. Oksidni sloj se formira na površini ako je izložen vlažnom zraku. Metal se sam zapali na zraku, ako se zagrije na 150 °C.

Logotip Wječnika
Logotip Wječnika
 Wječnik ima rječničku natuknicu samarij

Izvori

  1. ↑ a b c Sebastian Blumentritt Periodensystem der Elemente, 6. izd., Blume-Verlag, Münster (Savezna Republika Njemačka), 2012., ISBN 978-3-942-53009-5, str. 1.
Periodni sustav elemenata
H   He
Li Be   B C N O F Ne
Na Mg   Al Si P S Cl Ar
K Ca Sc   Ti V Cr Mn Fe Co Ni Cu Zn Ga
As
Br Kr
Rb Sr Y   Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn
Te I Xe
Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi
Rn
Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og

Alkalijski metali Zemnoalkalijski metali Lantanoidi Aktinoidi Prijelazni metali Slabi metali Polumetali Nemetali Halogeni elementi Plemeniti plinovi
 
Nedovršeni članak Samarij koji govori o kemijskom elementu treba dopuniti. Dopunite ga prema pravilima Wikipedije.

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