ಟೆಂಪ್ಲೇಟು:ಸಮಾರಿಯಮ್

Samarium,  ₆₂Sm

General properties
Name, symbol	samarium, Sm
Pronunciation	/səˈmɛəriəm/ sə-MAIR-ee-əm
Allotropes	α form
Appearance	silvery white
Samarium in the periodic table
– ↑ Sm ↓ Pu promethium ← samarium → europium
Atomic number	62
Standard atomic weight	150.36(2)
Element category	lanthanide
Group, block	group n/a, f-block
Period	period 6
Electron configuration	[Xe] 4f6 6s2
per shell	2, 8, 18, 24, 8, 2
Physical properties
Phase	solid
Melting point	1345 K ​(1072 °C, ​1962 °F)
Boiling point	2173 K ​(1900 °C, ​3452 °F)
Density (near r.t.)	7.52 g·cm−3 (at 0 °C, 101.325 kPa)
Liquid density	at m.p.: 7.16 g·cm−3
Heat of fusion	8.62 kJ·mol−1
Heat of	192 kJ·mol−1
Molar heat capacity	29.54 J·mol−1·K−1
pressureಟೆಂಪ್ಲೇಟು:Infobox element/vapor pressure table
Atomic properties
Oxidation states	4, 3, 2, 1 ​(a mildly basic oxide)
Electronegativity	1.17 (Pauling scale)
energies	1st: 544.5 kJ·mol−1 2nd: 1070 kJ·mol−1 3rd: 2260 kJ·mol−1
Atomic radius	empirical: 180 pm
Covalent radius	198±8 pm
Miscellanea
Crystal structure	​rhombohedral
Speed of sound	thin rod: 2130 m·s−1 (at 20 °C)
Thermal expansion	(r.t.) (α, poly) 12.7 µm·m−1·K−1
Thermal conductivity	13.3 W·m−1·K−1
Electrical resistivity	(r.t.) (α, poly) 0.940 µΩ·m
Magnetic ordering	paramagnetic
Young's modulus	α form: 49.7 GPa
Shear modulus	α form: 19.5 GPa
Bulk modulus	α form: 37.8 GPa
Poisson ratio	α form: 0.274
Vickers hardness	410–440 MPa
Brinell hardness	440–600 MPa
CAS number	7440-19-9
History
Naming	after the mineral samarskite (itself named after Vasili Samarsky-Bykhovets)
Discovery	1879
Most stable isotopes
iso NA half-life DM DE (MeV) DP 144Sm 3.07% – (β+β+) 1.7811 144Nd (α) 0.0761 140Nd 145Sm syn 340 d ε – 145Pm 146Sm trace 1.03×108 y α 2.529 142Nd 147Sm 14.99% 1.06×1011 y α 2.310 143Nd 148Sm 11.24% 7×1015 y α 1.986 144Nd 149Sm 13.82% >2×1015 y (α) 1.870 145Nd 150Sm 7.38% – (α) 1.4495 146Nd 151Sm syn 90 y β− – 151Eu 152Sm 26.75% – (α) 0.2203 148Nd 153Sm syn 46.284 h β− – 153Eu 154Sm 22.75% >2.3×1018 y (β−β−) 1.2510 154Gd
Decay modes in parentheses are predicted, but have not yet been observed

References

These references will appear in the article, but this list appears only on this page.

Template documentation[view] [edit] [history] [purge]

Infoboxes for the chemical elements use the core template {{Infobox element}}.

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weight ()     Element category     (set headers background color) Group     Period     Block     Electron configuration     Electrons per shell     PHYSICAL PROPERTIES (general note) Color Phase     Melting point         Boiling point         Sublimation point         Density     Density                 Liquid density     Liquid density     Triple point               Critical point       Heat of fusion           Heat of vaporization     Molar heat capacity           Vapor pressure               Vapor pressure               ATOMIC PROPERTIES Oxidation states     Electronegativity     Ionization energy                       Atomic radius           Covalent radius     Van der Waals radius     MISCELLANEA Crystal structure       Crystal structure       Speed of sound                 Thermal expansion           Thermal conductivity           Thermal diffusivity     Electrical resistivity                   Band gap     Curie point     Magnetic ordering     Tensile strength     Young's modulus     Shear modulus     Bulk modulus     Poisson ratio     Mohs hardness           Vickers hardness     Brinell hardness     CAS Number     HISTORY Naming Prediction   () Discovery   () First isolation   () Named by   ()   (History comment) ISOTOPES OF <element> Isotopes of <element>   (wp:engvar)

Subtemplates

Isotopes

Isotopes

Isotopes are to be entered by the editor using these subtemplates: {{Infobox element/isotopes stable}} {{Infobox element/isotopes decay}} {{Infobox element/isotopes decay2}} {{Infobox element/isotopes decay3}} {{Infobox element/isotopes decay3 (2 2 1)}} {{Infobox element/isotopes decay4}} Examples (from various elements): | isotopes = {{Infobox element/isotopes stable | link=Fluorine-19 | mn=19 | sym=F | na=100% | n=10 }} {{Infobox element/isotopes decay | mn=251 | sym=Cf | na=trace | hl=898 y | dm=α | de=6.172 | link1=curium-247 | pn=247 | ps=Cm}} {{Infobox element/isotopes decay2 | mn=252 | sym=Cf | na=trace | hl=2.645 y | dm1=α (96.91%)| de1=6.217 | link1=curium-248 | pn1=248 | ps1=Cm | dm2=SF (3.09%)| de2=– | pn2= | ps2=–}} {{Infobox element/isotopes decay3 | mn=26 | sym=Al | na=[[trace radioisotope|trace]] | hl={{val|7.17|e=5|ul=y}} | dm1=[[Positron emission|β<sup>+</sup>]] | de1=1.17 | link1=magnesium-26 | pn1=26 | ps1=Mg | dm2=[[electron capture|ε]] | de2=- | link2=magnesium-26 | pn2=26 | ps2=Mg | dm3=[[Gamma radiation|γ]] | de3=1.8086 | pn3= | ps3=- }} {{Infobox element/isotopes decay3 (2 2 1) | mn=22 | sym=Na | na=[[trace radioisotope|trace]] | hl=[[1 E7 s|2.602]] [[year|y]] | dm1=[[Beta decay|β<sup>+</sup>]]→[[Gamma decay|γ]] | de1a=0.5454 | link1a=neon-22 | pn1a=22 | ps1a=Ne* | de1b=1.27453(2)<ref name=npa521_1>{{cite journal | last=Endt | first=P. M. | title=Energy levels of A = 21–44 nuclei (VII) | journal=Nuclear Physics A | volume=521 | pages=1–400 | date=1990 | doi=10.1016/0375-9474(90)90598-G | bibcode=1990NuPhA.521....1E }}</ref> | pn1b=22 | ps1b=Ne | dm2=[[electron capture|ε]]→[[Gamma decay|γ]] | de2a=- | pn2a=22 | ps2a=Ne* | de2b=1.27453(2) | pn2b=22 | ps2b=Ne | dm3=[[Beta decay|β<sup>+</sup>]] | de3=1.8200 | pn3=22 | ps3=Ne }} {{Infobox element/isotopes_decay4 | mn=260 | sym=Md | na=[[synthetic radioisotope|syn]] | hl=31.8 [[day|d]] | dm1=SF | de1=- | pn1= | ps1=- | dm2=α | de2=7.000 | link2=einsteinium-256 | pn2=256 | ps2=Es | dm3=ε | de3=- | link3=fermium-260 | pn3=260 | ps3=Fm | dm4=[[beta emission|β<sup>−</sup>]] | de4=1.000 | link4=nobelium-260 | pn4=260 | ps4=No}} |isotopes comment=reference{{sfn|Chisté|2006}}1310<br> * = [[excited state]] produces the subtable: Demo,  00Xx General properties Name, symbol demo, {{{symbol}}} Demo in the periodic table {{{above}}} ↑ {{{symbol}}} ↓ {{{below}}} {{{left}}} ← demo → {{{right}}} Atomic number {{{number}}} Standard atomic weight Group, block group n/a, [[{{{block}}}-block]] Period [[Period (periodic table)#Period {{{period}}}|period {{{period}}}]] Electron configuration {{{electron configuration}}} Physical properties Atomic properties Most stable isotopes iso NA half-life DM DE (MeV) DP 19F 100% 19F is stable with 10 neutrons 251Cf trace 898 y α 6.172 247Cm 252Cf trace 2.645 y α (96.91%) 6.217 248Cm SF (3.09%) – – 26Al trace 7.17×105 y β+ 1.17 26Mg ε - 26Mg γ 1.8086 - 22Na trace 2.602 y β+→γ 0.5454 22Ne* 1.27453(2) 22Ne ε→γ - 22Ne* 1.27453(2) 22Ne β+ 1.8200 22Ne 260Md syn 31.8 d SF - - α 7.000 256Es ε - 260Fm β− 1.000 260No reference1310 * = excited state (Examples chosen to show various decay processes)

Other

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References

These references will appear in the article, but this list appears only on this page.

See also

• {{Infobox element}}
• ವರ್ಗ:Infobox element templates
• ವರ್ಗ:Periodic table infobox templates
• All subpages of Template:Infobox element
• ವರ್ಗ:Element infobox templates that need attention

Index to chemical element infoboxes
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
1	1H ibox																	2He ibox
2	3Li ibox	4Be ibox											5B ibox	6C ibox	7N ibox	8O ibox	9F ibox	10Ne ibox
3	11Na ibox	12Mg ibox											13Al ibox	14Si ibox	15P ibox	16S ibox	17Cl ibox	18Ar ibox
4	19K ibox	20Ca ibox	21Sc ibox	22Ti ibox	23V ibox	24Cr ibox	25Mn ibox	26Fe ibox	27Co ibox	28Ni ibox	29Cu ibox	30Zn ibox	31Ga ibox	32Ge ibox	33As ibox	34Se ibox	35Br ibox	36Kr ibox
5	37Rb ibox	38Sr ibox	39Y ibox	40Zr ibox	41Nb ibox	42Mo ibox	43Tc ibox	44Ru ibox	45Rh ibox	46Pd ibox	47Ag ibox	48Cd ibox	49In ibox	50Sn ibox	51Sb ibox	52Te ibox	53 I  ibox	54Xe ibox
6	55Cs ibox	56Ba ibox		72Hf ibox	73Ta ibox	74W ibox	75Re ibox	76Os ibox	77Ir ibox	78Pt ibox	79Au ibox	80Hg ibox	81Tl ibox	82Pb ibox	83Bi ibox	84Po ibox	85At ibox	86Rn ibox
7	87Fr ibox	88Ra ibox		104Rf ibox	105Db ibox	106Sg ibox	107Bh ibox	108Hs ibox	109Mt ibox	110Ds ibox	111Rg ibox	112Cn ibox	113Uut ibox	114Fl ibox	115Uup ibox	116Lv ibox	117Uus ibox	118Uuo ibox
8	119Uue ibox	120Ubn ibox
			57La ibox	58Ce ibox	59Pr ibox	60Nd ibox	61Pm ibox	62Sm ibox	63Eu ibox	64Gd ibox	65Tb ibox	66Dy ibox	67Ho ibox	68Er ibox	69Tm ibox	70Yb ibox	71Lu ibox
			89Ac ibox	90Th ibox	91Pa ibox	92U ibox	93Np ibox	94Pu ibox	95Am ibox	96Cm ibox	97Bk ibox	98Cf ibox	99Es ibox	100Fm ibox	101Md ibox	102No ibox	103Lr ibox
ವರ್ಗ:Periodic table infobox templates (by element) · ವರ್ಗ:Infobox element templates (subtemplates)
Sandboxes: {{Infobox element/sandbox}} · {{Infobox element/testcases}}

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