Chemicool
Gd
64
157.25
Gadolinium
General
|
States
|
Energies
|
Oxidation & Electrons
|
Appearance & Characteristics
Reactions
|
Other Forms
|
Radius
|
Conductivity
|
Abundance
Encyclopedia Britannica articles
General
Name
Gadolinium
Symbol
Gd
atomic number
64
Atomic weight
157.25
Density @ 293 K
7.895 g/cm3
Atomic volume
19.9 cm3/mol
Group
Rare Earth, Lanthanides
discovered
1880
States
state (s, l, g)
s
melting point
1584.2 K
boiling point
3273 K
Heat of fusion
10.050 kJ/mol
Heat of vaporization
359.40 kJ/mol
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Energies
1st ionization energy
592.6 kJ/mole
electronegativity
1.17
2nd ionization energy
1167 kJ/mole
electron affinity
50 kJ/mole
3rd ionization energy
1991 kJ/mole
Specific heat
0.23 J/gK
heat atomization
398 kJ/mole atoms
Oxidation & Electrons
Shells
2,8,18,25,9,2
electron configuration
[Xe] 4f7 5d1 6s2
minimum oxidation number
0
maximum oxidation number
3
min. common oxidation no.
0
max. common oxidation no.
3
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Appearance & Characteristics
structure
hcp: hexagonal close pkd
color
silvery-white
uses
alloys, CD disk
toxicity
hardness
mohs
characteristics
Reactions
reaction with air
vigorous, =>Gd2O3
reaction with 6M HCl
mild, =>H2, GdCl3
reaction with 6M HCl
mild, =>H2, GdCl3
reaction with 15M HNO3
mild, =>Gd(NO3)3
reaction with 6M NaOH
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Other Forms
number of isotopes
7
hydride(s)
GdH2 GdH3
oxide(s)
Gd2O3
chloride(s)
GdCl3
Radius
ionic radius (2- ion)
pm
ionic radius (1- ion)
pm
atomic radius
180 pm
ionic radius (1+ ion)
pm
ionic radius (2+ ion)
pm
ionic radius (3+ ion)
107.8 pm
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Conductivity
thermal conductivity
10.5 J/m-sec-deg
electrical conductivity
7.9 1/mohm-cm
polarizability
23.5 A^3
Abundance
source
Monazite(phosphate),bastnaesite
rel. abund. solar system
-0.481 log
abundance earth's crust
0.7 log
cost, pure
191 $/100g
cost, bulk
$/100g
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