Samarium

Saking Wikipédia
Samarium, 62Sm
Samarium-2.jpg
Samarium
samariyum·
Pabaosan/səˈmɛəriəm/ (sə-MAIR-ee-əm)
Cingakanpetak kapérakan
Bobot atom standar Ar, std(Sm)150.36(2)[1]
Samarium ring tabél périodik
Hidrogén Hélium
Litium Bérilium Boron Karbon Nitrogén Oksigén Fluorin Néon
Natrium Magnésium Aluminium Silikon Phosfor Urirang Klorin Argon
Potasium Kalsium Skandium Titanium Vanadium Kromium Mangan (datu) Wesi Kobalt Nikel Temaga Séng Gallium Gérmanium Arsenik Sélénium Brom Kripton
Rubidium Strontium Ittrium Zirkonium Niobium Molibdénum Téknésium Ruthénium Rhodium Palladium Pérak Kadmium Indium Timah Antimoni Téllurium Yodium Xénon
Sésium Barium Lanthanum Sérium Praséodimium Néodimium Prométhium Samarium Éuropium Gadolinium Terbium Disprosium Holmium Érbium Thulium Itterbium Lutésium Hafnium Tantalum Tungstén Rhénium Osmium Iridium Platinum Mas Rasa (datu) Thallium Timbal Bismuth Polonium Astatin Radon
Fransium Radium Aktinium Thorium Protaktinium Uranium Néptunium Plutonium Amérisium Curium Berkélium Kalifornium Éinsteinium Fermium Méndelevium Nobélium Lawrénsium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnérium Darmstadtium Roéntgénium Kopernikium Nihonium Flérovium Moskovium Livermorium Ténnessin Oganésson


Sm

Pu
prométhiumsamariuméuropium
Wilangan atom (Z)62
Watekn/a
Périodepériode 6
Blok  blok-f
Konpigurasi éléktron[] 4f6 6s2
Éléktron per kulit2, 8, 18, 24, 8, 2
Cecirén pisik
Pase ring STPpadet
Titik lebur1345 K ​(1072 °C, ​1962 °F)
Titik didih2173 K ​(1900 °C, ​3452 °F)
Kapadetan (nampek s.r.)7.52 g/cm3
ri kala éncéh (ring t.l.)7.16 g/cm3
Panes fusi8.62 kJ/mol
Panes panguapan192 kJ/mol
Kapasitas panes molar29.54 J/(mol·K)
Tekanan uap
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1001 1106 1240 (1421) (1675) (2061)
Cecirén atom
Paindikan oksidasi0,[2] +1,[3] +2, +3 (oksida basa tenga)
Kaéléktronégatipanskala Pauling: 1.17
Wasa ionisasi
  • ka-1: 544.5 kJ/mol
  • ka-2: 1070 kJ/mol
  • ka-3: 2260 kJ/mol
Jeriji atomémpiris: 180 pm
Jeriji kovalén198±8 pm
Garis warna ring pentang spéktrum
Garis spéktral saking samarium
Cecirén liyanan
Rupa alamiprimordial
Struktur kristalrombohédron
Rhombohedral crystal structure for samarium
Kagelisan swara pales tipis2130 m/s (at 20 °C)
Ékspansi térmal(s.r.) (α, poli) 12.7 µm/(m⋅K)
Konduktivitas térmal13.3 W/(m⋅K)
Resistivitas listrik(s.r.) (α, poli) 0.940 µΩ⋅m
bacakan magnétikparamagnétik[4]
Karentanan magnétik molar+1860.0×10−6 cm3/mol (291 K)[5]
Modulus Youngα form: 49.7 GPa
Modulus Shearα form: 19.5 GPa
Modulus Bulkα form: 37.8 GPa
Rasio Poissonα form: 0.274
Kakatosan Vickers410–440 MPa
Kakatosan Brinell440–600 MPa
Nomor CAS7440-19-9
Lelintihan
Pangarananmawit mineral samarskite (kaaranin ngeraga olih Vassili Samarsky-Bykhovets)
Panemuan miwah isolasi kapertamaLecoq de Boisbaudran (1879)
Isotop utama samarium
Iso­top Kalimpahan Paruh-idup (t1/2) Mode paluruhan Pro­duk
144Sm 3.08% tegteg
145Sm syn 340 d ε 145Pm
146Sm syn 6.8×107 y α 142Nd
147Sm 15.00% 1.06×1011 y α 143Nd
148Sm 11.25% ping 7;1015 y α 144Nd
149Sm 13.82% tegteg
150Sm 7.37% tegteg
151Sm syn 90 y β 151Eu
152Sm 26.74% tegteg
153Sm syn 46.284 h β 153Eu
154Sm 22.74% tegteg
Symbol question.svg Kategori:Samarium
| pustaka

Samarium silih tunggil datu kimia antuk simbol Sm miwah wilangan atom 62. Punika logam kapérakan katos alon kaoksidasi ring udara. Manados anggota khas saking dérét lantanida, samarium ketah nyané kanikayang ring paindikan oksidasi +3. Senyawa samarium(II) taler kauningin, kautama monoksida SmO, monokalkogénida SmS, SmSé dan SmTé, taler samarium(II) iodida. Senyawa ungkur punika agén paréduksi sané ketah ring sintésis kimia. Samarium nénten ngelah kawigunaan biologis sané signifikan menawi wantah ekedik nubain.

Pustaka[uah | uah wit]

  1. Méija, Juris; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.
  2. Yttrium and all lanthanides except Ce and Pm have been observed in the oxidation state 0 in bis(1,3,5-tri-t-butylbenzene) complexes, see Cloke, F. Geoffrey N. (1993). "Zero Oxidation State Compounds of Scandium, Yttrium, and the Lanthanides". Chem. Soc. Rev. 22: 17–24. doi:10.1039/CS9932200017. and Arnold, Polly L.; Petrukhina, Marina A.; Bochenkov, Vladimir E.; Shabatina, Tatyana I.; Zagorskii, Vyacheslav V.; Cloke (2003-12-15). "Arene complexation of Sm, Eu, Tm and Yb atoms: a variable temperature spectroscopic investigation". Journal of Organometallic Chemistry. 688 (1–2): 49–55. doi:10.1016/j.jorganchem.2003.08.028.
  3. SmB6- cluster anion has been reported and contains Sm in rare oxidation state of +1; see Paul, J. Robinson; Xinxing, Zhang; Tyrel, McQueen; Kit, H. Bowen; Anastassia, N. Alexandrova (2017). "SmB6 Cluster Anion: Covalency Involving f Orbitals". J. Phys. Chem. A 2017, 121, 8, 1849–1854. 121 (8): 1849–1854..
  4. Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (édisi ka-86th). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.
  5. Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

Suratan[uah | uah wit]

  • Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (édisi ka-2nd). Butterworth–Heinemann. ISBN 0080379419.

Pranala jaba[uah | uah wit]