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.
Samarium, 62 Sm Samarium samariyum· Pabaosan (sə-MAIR -ee-əm ) Cingakan petak kapérakan Bobot atom standar A r, std (Sm) 7002150360000000000♠ 150.36(2)[1] Samarium ring tabél périodik
Wilangan atom (Z ) 62 Watek n/a Période période 6 Blok blok-f Konpigurasi éléktron [Xé ] 4f6 6s2 Éléktron per kulit 2, 8, 18, 24, 8, 2 Cecirén pisik Pase ring STP padet Titik lebur 1345 K (1072 °C, 1962 °F) Titik didih 2173 K (1900 °C, 3452 °F) Kapadetan (nampek s.r. ) 7.52 g/cm3 ri kala éncéh (ring t.l. ) 7.16 g/cm3 Panes fusi 8.62 kJ/mol Panes panguapan 192 kJ/mol Kapasitas panes molar 29.54 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 oksidasi 0,[2] +1,[3] +2, +3 (oksida basa tenga) Kaéléktronégatipan skala Pauling: 1.17 Wasa ionisasi ka-1: 544.5 kJ/mol ka-2: 1070 kJ/mol ka-3: 2260 kJ/mol Jeriji atom émpiris: 180 pm Jeriji kovalén 198±8 pm Garis spéktral saking samariumCecirén liyanan Rupa alami primordial Struktur kristal rombohédron Kagelisan swara pales tipis 2130 m/s (ring 20 °C) Ékspansi térmal (s.r. ) (α, poli) 12.7 µm/(m⋅K) Konduktivitas térmal 13.3 W/(m⋅K) Resistivitas listrik (s.r. ) (α, poli) 0.940 µΩ⋅m bacakan magnétik paramagnétik [4] Karentanan magnétik molar 6997186000000000000♠ +1860 .0× 10−6 cm3 /mol (291 K)[5] Modulus Young α form: 49.7 GPa Modulus Shear α form: 19.5 GPa Modulus Bulk α form: 37.8 GPa Rasio Poisson α form: 0.274 Kakatosan Vickers 410–440 MPa Kakatosan Brinell 440–600 MPa Nomor CAS 7440-19-9 Lelintihan Pangaranan mawit mineral samarskite (kaaranin ngeraga olih Vassili Samarsky-Bykhovets ) Panemuan miwah isolasi kapertamaLecoq de Boisbaudran (1879)Isotop utama samarium
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Pustaka
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↑ 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 .
↑ 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 .
↑ 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. .
↑ 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 .
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics . Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4 .
Suratan
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Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (édisi ka-2nd). Butterworth–Heinemann. ISBN 0080379419 . Pranala jaba
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