మూస:గాడోలీనియం మూలకము

Gadolinium, ₀₀Gd

Gadolinium
Pronunciation	/ˌɡædəˈlɪniəm/ ​(GAD-ə-LIN-ee-əm)
Appearance	silvery white
Standard atomic weight Ar°(Gd)
	157.25±0.03 157.25±0.03 (abridged)
Gadolinium in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium – ↑ Gd ↓ Cm europium ← gadolinium → terbium
Group	మూస:Infobox element/symbol-to-group/format
Period	period 6
Block	f-block
Electron configuration	[Xe] 4f7 5d1 6s2
Electrons per shell	2, 8, 18, 25, 9, 2
Physical properties
Phase at STP	solid
Melting point	1585 K ​(1312 °C, ​2394 °F)
Boiling point	3273 K ​(3000 °C, ​5432 °F)
Density (near r.t.)	7.90 g/cm3
when liquid (at m.p.)	7.4 g/cm3
Heat of fusion	10.05 kJ/mol
Heat of vaporization	301.3 kJ/mol
Molar heat capacity	37.03 J/(mol·K)
Vapor pressure (calculated) P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1836 2028 2267 2573 2976 3535
Atomic properties
Oxidation states	0, +1, +2, +3 (a mildly basic oxide)
Electronegativity	Pauling scale: 1.20
Ionization energies	1st: 593.4 kJ/mol 2nd: 1170 kJ/mol 3rd: 1990 kJ/mol
Atomic radius	empirical: 180 pm
Covalent radius	196±6 pm
Spectral lines of gadolinium
Other properties
Natural occurrence	primordial
Crystal structure	​hexagonal close-packed (hcp)
Speed of sound thin rod	2680 m/s (at 20 °C)
Thermal expansion	α poly: 9.4 µm/(m⋅K) (at 100 °C)
Thermal conductivity	10.6 W/(m⋅K)
Electrical resistivity	α, poly: 1.310 µΩ⋅m
Magnetic ordering	ferromagnetic-paramagnetic transition at 293.4 K
Young's modulus	α form: 54.8 GPa
Shear modulus	α form: 21.8 GPa
Bulk modulus	α form: 37.9 GPa
Poisson ratio	α form: 0.259
Vickers hardness	570 MPa
CAS Number	7440-54-2
History
Naming	after the mineral Gadolinite (itself named after Johan Gadolin)
Discovery	Jean Charles Galissard de Marignac (1880)
First isolation	Lecoq de Boisbaudran (1886)
Isotopes of gadolinium

References

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

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ionization energy comment

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ionization energy

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Parameter list

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|heat fusion ref= |heat fusion comment= |heat fusion 2= |heat fusion 2 ref= |heat fusion 2 comment= |heat vaporization= |heat vaporization ref= |heat vaporization comment= |heat capacity= |heat capacity ref= |heat capacity comment= |heat capacity 2= |heat capacity 2 ref= |heat capacity 2 comment= |vapor pressure 1= |vapor pressure 10= |vapor pressure 100= |vapor pressure 1 k= |vapor pressure 10 k= |vapor pressure 100 k= |vapor pressure ref= |vapor pressure comment= |vapor pressure 1 2= |vapor pressure 10 2= |vapor pressure 100 2= |vapor pressure 1 k 2= |vapor pressure 10 k 2= |vapor pressure 100 k 2= |vapor pressure 2 ref= |vapor pressure 2 comment= <!-- Atomic properties --> |atomic properties comment= |electronegativity= |electronegativity ref= |electronegativity comment= |ionization energy 1= |ionization energy 1 ref= |ionization energy 1 comment= |ionization energy 2= |ionization energy 2 ref= |ionization energy 2 comment= |ionization energy 3= |ionization energy 3 ref= |ionization energy 3 comment= |number of ionization energies= |ionization energy ref= |ionization energy comment= |atomic radius= |atomic radius ref= |atomic radius comment= |atomic radius calculated= |atomic radius calculated ref= |atomic radius calculated comment= |covalent radius= |covalent radius ref= |covalent radius comment= |Van der Waals radius= |Van der Waals radius ref= |Van der Waals radius comment= <!-- Miscellanea --> |crystal structure= |crystal structure prefix= |crystal structure ref= |crystal structure comment= |crystal structure 2= |crystal structure 2 prefix= |crystal structure 2 ref= |crystal structure 2 comment= |speed of sound= |speed of sound ref= |speed of sound comment= |speed of sound rod at 20= |speed of sound rod at 20 ref= |speed of sound rod at 20 comment= |speed of sound rod at r.t.= |speed of sound rod at r.t. ref= |speed of sound rod at r.t. comment= |thermal expansion= |thermal expansion ref= |thermal expansion comment= |thermal expansion at 25= |thermal expansion at 25 ref= |thermal expansion at 25 comment= |thermal conductivity= |thermal conductivity ref= |thermal conductivity comment= |thermal conductivity 2= |thermal conductivity 2 ref= |thermal conductivity 2 comment= |thermal diffusivity= |thermal diffusivity ref= |thermal diffusivity comment= |electrical resistivity= |electrical resistivity unit prefix= |electrical resistivity ref= |electrical resistivity comment= |electrical resistivity at 0= |electrical resistivity at 0 ref= |electrical resistivity at 0 comment= |electrical resistivity at 20= |electrical resistivity at 20 ref= |electrical resistivity at 20 comment= |band gap= |band gap ref= |band gap comment= |Curie point K= |Curie point ref= |Curie point comment= |magnetic ordering= |magnetic ordering ref= |magnetic ordering comment= |tensile strength= |tensile strength ref= |tensile strength comment= |Young's modulus= |Young's modulus ref= |Young's modulus comment= |Shear modulus= |Shear modulus ref= |Shear modulus comment= |Bulk modulus= |Bulk modulus ref= |Bulk modulus comment= |Poisson ratio= |Poisson ratio ref= |Poisson ratio comment= |Mohs hardness= |Mohs hardness ref= |Mohs hardness comment= |Mohs hardness 2= |Mohs hardness 2 ref= |Mohs hardness 2 comment= |Vickers hardness= |Vickers hardness ref= |Vickers hardness comment= |Brinell hardness= |Brinell hardness ref= |Brinell hardness comment= |CAS number= |CAS number ref= |CAS number comment= <!-- History --> |naming= |predicted by= |prediction date ref= |prediction date= |discovered by= |discovery date ref= |discovery date= |first isolation by= |first isolation date ref= |first isolation date= |discovery and first isolation by= |named by= |named date ref= |named date= |history comment label= |history comment= <!-- Isotopes --> |isotopes= |isotopes ref= |isotopes comment= <!-- other --> |engvar= |QID= }} {{Infobox element}}; labels & notes:   (Image)       GENERAL PROPERTIES Name Symbol Pronunciation (data central)   Alternative name(s)   Allotropes Appearance <element> IN THE PERIODIC TABLE Periodic table       Atomic number Standard atomic weight (data central)   Element category (also header bg color)     (sets header bg color, over 'series='-color) Group     Period     Block     Electron configuration     Electrons per shell     PHYSICAL PROPERTIES (general note) Color Phase     Melting point         Boiling point         Sublimation point         Density [g/L at s.t.p.]     Density [kg/m3 at s.t.p.]     Density [g/cm3 near room temperature]      [g/cm3 near r.t.], #2      [g/cm3 near r.t.], #3     Density (liquid, melting point) [g/cm3]     Density (liquid, boiling point) [g/cm3]     Molar volume Unit defaults to cm3/mol  otherwise set unit prefix=d for dm3/mol (gases)   Triple point               Critical point       Heat of fusion           Heat of vaporization     Molar heat capacity           Vapor pressure               Vapor pressure               ATOMIC PROPERTIES 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   () Discovery and first isolation (1 or 2 dates) 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}}<br> * = [[excited state]] produces the subtable: Demo, 00Xx Demo in the periodic table Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium {{{above}}} ↑ {{{symbol}}} ↓ {{{below}}} {{{left}}} ← demo → {{{right}}} Group మూస:Infobox element/symbol-to-group/format Isotopes of demo

Other

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{{Periodic table (32 columns, micro)}}

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• {{Infobox element/vapor pressure table}}
• {{Infobox element/crystal structure}} (documentation)

References

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

See also

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

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