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Erbium
Erbium

Hafnium
Hafnium



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Erbium vs Hafnium

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1 Periodic Table
1.1 Symbol
Er
Hf
1.2 Group Number
Tennessine
Not Available
Rank: N/A (Overall)
4
Rank: 14 (Overall)
Gadolinium
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1.3 Period Number
Uranium
6
Rank: 2 (Overall)
6
Rank: 2 (Overall)
Lithium
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1.4 Block
f block
d block
1.5 Element Family
Lanthanide
Transition Metal
1.6 CAS Number
Roentgenium
7440520
Rank: 35 (Overall)
7440586
Rank: 30 (Overall)
Aluminium
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1.7 Space Group Name
P63/mmc
P63/mmc
1.8 Space Group Number
Sodium
194.00
Rank: 5 (Overall)
194.00
Rank: 5 (Overall)
Plutonium
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2 Facts
2.1 Interesting Facts
  • Erbium metal is used as alloyed with Vanadium to make it softer.
  • Recent studies shows that it is helpful for metabolism.
  • Hafnium metal is highly reactive, hence not found free in nature.
  • Hafnium metal as predicated after Mendeleev finished his periodic table.
2.2 Sources
Mining
By-product Zirconium Refining
2.3 History
2.3.1 Who Discovered
Carl Gustaf Mosander
Dirk Coster and George de Hevesy
2.3.2 Discovery
In 1842
In 1922
2.4 Abundance
2.4.1 Abundance In Universe
Iron
2 * 10-7 %
Rank: 22 (Overall)
7 * 10-8 %
Rank: 25 (Overall)
Thallium
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2.4.2 Abundance In Sun
Iron
~0.0000001 %
Rank: 26 (Overall)
~0.0000001 %
Rank: 26 (Overall)
Beryllium
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2.4.3 Abundance In Meteorites
Iron
0.00 %
Rank: 36 (Overall)
0.00 %
Rank: 37 (Overall)
Gold
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2.4.4 Abundance In Earth's Crust
Aluminium
0.00 %
Rank: 32 (Overall)
0.00 %
Rank: 31 (Overall)
Radium
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2.4.5 Abundance In Oceans
Sodium
0.00 %
Rank: 36 (Overall)
0.00 %
Rank: 27 (Overall)
Protactinium
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2.4.6 Abundance In Humans
Calcium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Radium
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3 Uses
3.1 Uses & Benefits
  • It has a tendency to get tarnished in the open air, but when alloyed with elements like erbium, vanadium, its hardness levels decreases.
  • Its compounds like Erbium oxide is used in safety glasses of welders and metal workers.
  • It has an ability to absorb neutrons and hence it is used to make control rods in nuclear submarines. And this metal is also used in Plasma welding torches.
  • It alloys with iron, titanium and niobium are very useful.
3.1.1 Industrial Uses
Chemical Industry
Ammunition Industry
3.1.2 Medical Uses
NA
NA
3.1.3 Other Uses
Alloys
Alloys, In Nuclear Reactors, Nuclear Research, Research Purposes
3.2 Biological Properties
3.2.1 Toxicity
Mildly Toxic
Toxic
3.2.2 Present in Human Body
27% Lanthanide Series Metals have it !
60% Transition Metals Metals have it !
3.2.3 In Blood
Sodium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Plutonium
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3.2.4 In Bone
Calcium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Plutonium
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4 Physical
4.1 Melting Point
Tungsten
1,522.00 °C
Rank: 28 (Overall)
2,150.00 °C
Rank: 10 (Overall)
Francium
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4.2 Boiling Point
Tungsten
2,510.00 °C
Rank: 44 (Overall)
5,400.00 °C
Rank: 5 (Overall)
Flerovium
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4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silvery White
Gray
4.3.3 Luster
Lustrous
Metallic
4.4 Hardness
4.4.1 Mohs Hardness
Chromium
Not Available
Rank: N/A (Overall)
5.50
Rank: 7 (Overall)
Cesium
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4.4.2 Brinell Hardness
Osmium
814.00 MPa
Rank: 11 (Overall)
1,450.00 MPa
Rank: 6 (Overall)
Cesium
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4.4.3 Vickers Hardness
Tungsten
589.00 MPa
Rank: 19 (Overall)
1,520.00 MPa
Rank: 5 (Overall)
Palladium
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4.5 Speed of Sound
Technetium
2,830.00 m/s
Rank: 28 (Overall)
3,010.00 m/s
Rank: 27 (Overall)
Thallium
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4.6 Optical Properties
4.6.1 Refractive Index
Palladium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Mercury
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4.6.2 Reflectivity
Silver
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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4.7 Allotropes
No Lanthanide Series Metals has it !
6% Transition Metals Metals have it !
4.7.1 α Allotropes
Not Available
Not Available
4.7.2 β Allotropes
Not Available
Not Available
4.7.3 γ Allotropes
Not Available
Not Available
5 Chemical
5.1 Chemical Formula
Er
Hf
5.2 Isotopes
5.2.1 Known Isotopes
Palladium
31
Rank: 8 (Overall)
32
Rank: 7 (Overall)
Tennessine
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5.3 Electronegativity
5.3.1 Pauling Electronegativity
Gold
1.24
Rank: 36 (Overall)
1.30
Rank: 32 (Overall)
Francium
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5.3.2 Sanderson Electronegativity
Cobalt
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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5.3.3 Allred Rochow Electronegativity
Gallium
1.11
Rank: 29 (Overall)
1.23
Rank: 25 (Overall)
Cesium
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5.3.4 Mulliken-Jaffe Electronegativity
Polonium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cesium
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5.3.5 Allen Electronegativity
Berkelium
Not Available
Rank: N/A (Overall)
1.16
Rank: 37 (Overall)
Cesium
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5.4 Electropositivity
5.4.1 Pauling Electropositivity
Francium
2.76
Rank: 18 (Overall)
2.70
Rank: 22 (Overall)
Gold
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5.5 Ionization Energies
5.5.1 1st Energy Level
Chromium
589.30 kJ/mol
Rank: 59 (Overall)
658.50 kJ/mol
Rank: 40 (Overall)
Cesium
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5.5.2 2nd Energy Level
Chromium
1,150.00 kJ/mol
Rank: 68 (Overall)
1,440.00 kJ/mol
Rank: 44 (Overall)
Ruthenium
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5.5.3 3rd Energy Level
Chromium
2,194.00 kJ/mol
Rank: 65 (Overall)
2,250.00 kJ/mol
Rank: 60 (Overall)
Osmium
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5.5.4 4th Energy Level
Chromium
4,120.00 kJ/mol
Rank: 33 (Overall)
3,216.00 kJ/mol
Rank: 63 (Overall)
Thorium
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5.5.5 5th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Dubnium
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5.5.6 6th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Seaborgium
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5.5.7 7th Energy level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bohrium
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5.5.8 8th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Hassium
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5.5.9 9th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Yttrium
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5.5.10 10th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Strontium
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5.5.11 11th Energy Level
Magnesium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Yttrium
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5.5.12 12th Energy Level
Magnesium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.13 13th Energy Level
Titanium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.14 14th Energy Level
Vanadium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.15 15th Energy Level
Chromium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Manganese
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5.5.16 16th Energy Level
Manganese
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Iron
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5.5.17 17th Energy Level
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Cobalt
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5.5.18 18th Energy Level
Cobalt
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Nickel
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5.5.19 19th Energy Level
Nickel
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Copper
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5.5.20 20th Energy Level
Zinc
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.21 21st Energy Level
Zinc
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.22 22nd Energy Level
Copper
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.23 23rd Energy Level
Copper
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.24 24th Energy Level
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
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5.5.25 25th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.26 26th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.27 27th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.28 28th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.29 29th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.5.30 30th Energy Level
Molybdenum
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Molybdenum
5.6 Electrochemical Equivalent
Francium
2.08 g/amp-hr
Rank: 28 (Overall)
1.66 g/amp-hr
Rank: 44 (Overall)
Beryllium
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5.7 Electron Work Function
Platinum
Not Available
Rank: N/A (Overall)
3.90 eV
Rank: 27 (Overall)
Cesium
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5.8 Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
6 Atomic
6.1 Atomic Number
Tennessine
68
Rank: 48 (Overall)
72
Rank: 44 (Overall)
Lithium
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6.2 Electron Configuration
[Xe] 4f12 6s2
[Xe] 4f14 5d2 6s2
6.3 Crystal Structure
Hexagonal Close Packed (HCP)
Hexagonal Close Packed (HCP)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
Tennessine
68
Rank: 47 (Overall)
72
Rank: 43 (Overall)
Lithium
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6.4.2 Number of Neutrons
Flerovium
99
Rank: 33 (Overall)
106
Rank: 29 (Overall)
Lithium
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6.4.3 Number of Electrons
Tennessine
68
Rank: 47 (Overall)
72
Rank: 43 (Overall)
Lithium
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6.5 Radius of an Atom
6.5.1 Atomic Radius
Cesium
176.00 pm
Rank: 18 (Overall)
159.00 pm
Rank: 28 (Overall)
Beryllium
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6.5.2 Covalent Radius
Francium
189.00 pm
Rank: 19 (Overall)
175.00 pm
Rank: 23 (Overall)
Beryllium
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6.5.3 Van der Waals Radius
Francium
Not Available
Rank: N/A (Overall)
200.00 pm
Rank: 28 (Overall)
Zinc
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6.6 Atomic Weight
Tennessine
167.26 amu
Rank: 43 (Overall)
178.49 amu
Rank: 39 (Overall)
Lithium
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6.7 Atomic Volume
Cesium
18.40 cm3/mol
Rank: 25 (Overall)
13.60 cm3/mol
Rank: 38 (Overall)
Manganese
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6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
Platinum
49.00 (-eV)
Rank: 29 (Overall)
81.00 (-eV)
Rank: 16 (Overall)
Francium
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6.10 Lattice Constant
Manganese
355.88 pm
Rank: 39 (Overall)
319.64 pm
Rank: 55 (Overall)
Beryllium
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6.11 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
6.12 Lattice C/A Ratio
Cadmium
1.57
Rank: 17 (Overall)
1.58
Rank: 12 (Overall)
Beryllium
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7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
Hassium
9.07 g/cm3
Rank: 42 (Overall)
13.31 g/cm3
Rank: 26 (Overall)
Lithium
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7.1.2 Density When Liquid (at m.p.)
Osmium
8.86 g/cm3
Rank: 23 (Overall)
12.00 g/cm3
Rank: 12 (Overall)
Lithium
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7.2 Tensile Strength
Iron
Not Available
Rank: N/A (Overall)
445.00 MPa
Rank: 8 (Overall)
Indium
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7.3 Viscosity
Mercury
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Mercury
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
Strontium
0.00 (Pa)
Rank: 20 (Overall)
Not Available
Rank: N/A (Overall)
Cerium
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7.4.2 Vapor Pressure at 2000 K
Chromium
Not Available
Rank: N/A (Overall)
0.00 (Pa)
Rank: 24 (Overall)
Tungsten
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7.5 Elasticity properties
7.5.1 Shear Modulus
Osmium
28.30 GPa
Rank: 25 (Overall)
30.00 GPa
Rank: 23 (Overall)
Potassium
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7.5.2 Bulk Modulus
Osmium
44.40 GPa
Rank: 27 (Overall)
110.00 GPa
Rank: 15 (Overall)
Cesium
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7.5.3 Young's Modulus
Iridium
69.90 GPa
Rank: 29 (Overall)
78.00 GPa
Rank: 25 (Overall)
Cesium
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7.6 Poisson Ratio
Gallium
0.24
Rank: 28 (Overall)
0.37
Rank: 7 (Overall)
Beryllium
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7.7 Other Mechanical Properties
Malleable
Ductile, Malleable
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
Cobalt
9.07
Rank: 32 (Overall)
13.31
Rank: 18 (Overall)
Lithium
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8.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
8.1.3 Permeability
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bismuth
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8.1.4 Susceptibility
Iron
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Bismuth
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8.2 Electrical Properties
8.2.1 Electrical Property
Conductor
Conductor
8.2.2 Resistivity
Mercury
0.86 nΩ·m
Rank: 63 (Overall)
331.00 nΩ·m
Rank: 14 (Overall)
Thallium
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8.2.3 Electrical Conductivity
Silver
0.01 106/cm Ω
Rank: 53 (Overall)
0.03 106/cm Ω
Rank: 39 (Overall)
Plutonium
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8.2.4 Electron Affinity
Gold
50.00 kJ/mol
Rank: 21 (Overall)
0.00 kJ/mol
Rank: 40 (Overall)
Mercury
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9 Thermal
9.1 Specific Heat
Lithium
0.17 J/(kg K)
Rank: 34 (Overall)
0.14 J/(kg K)
Rank: 37 (Overall)
Americium
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9.2 Molar Heat Capacity
Americium
28.12 J/mol·K
Rank: 11 (Overall)
25.73 J/mol·K
Rank: 36 (Overall)
Beryllium
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9.3 Thermal Conductivity
Silver
14.50 W/m·K
Rank: 55 (Overall)
23.00 W/m·K
Rank: 41 (Overall)
Neptunium
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9.4 Critical Temperature
Lithium
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Ytterbium
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9.5 Thermal Expansion
Cesium
12.20 µm/(m·K)
Rank: 31 (Overall)
5.90 µm/(m·K)
Rank: 54 (Overall)
Tungsten
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9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
Tungsten
261.00 kJ/mol
Rank: 35 (Overall)
661.10 kJ/mol
Rank: 5 (Overall)
Zinc
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9.6.2 Enthalpy of Fusion
Tungsten
17.20 kJ/mol
Rank: 15 (Overall)
25.10 kJ/mol
Rank: 8 (Overall)
Cesium
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9.6.3 Enthalpy of Atomization
Tungsten
314.00 kJ/mol
Rank: 33 (Overall)
703.00 kJ/mol
Rank: 5 (Overall)
Mercury
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9.7 Standard Molar Entropy
Protactinium
73.10 J/mol.K
Rank: 11 (Overall)
43.60 J/mol.K
Rank: 34 (Overall)
Beryllium
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