Erbium vs Flerovium
Periodic Table
Symbol
Er
Fl
Group Number
Not Available
14
4
Period Number
6
7
Block
f block
p block
Element Family
Lanthanide
Post-Transition
CAS Number
7440520
35
54085164
5
Space Group Name
P63/mmc
Not Available
Space Group Number
194.00
5
Not Available
Facts
Interesting Facts
- Erbium metal is used as alloyed with Vanadium to make it softer.
- Recent studies shows that it is helpful for metabolism.
Not Available
Sources
Mining
NA
History
Who Discovered
Carl Gustaf Mosander
Joint Institute for Nuclear Research and Lawrence Livermore National Laboratory
Discovery
In 1842
In 1999
Abundance
Abundance In Universe
2 * 10-7 %
22
Not Available
Abundance In Sun
~0.0000001 %
26
~-9999 %
Abundance In Meteorites
0.00 %
36
Not Available
Abundance In Earth's Crust
0.00 %
32
Not Available
Abundance In Oceans
0.00 %
36
Not Available
Uses
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.
- Currently known uses of Flerovium metal are limited to research purpose only.
Industrial Uses
Chemical Industry
NA
Medical Uses
NA
NA
Other Uses
Alloys
Alloys, Research Purposes
Biological Properties
Toxicity
Mildly Toxic
Unknown
Present in Human Body
No
No
Physical Properties
Melting Point
1,522.00 °C
28
67.00 °C
99+
Boiling Point
2,510.00 °C
99+
147.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silvery White
Unknown
Luster
Lustrous
Unknown Luster
Hardness
Brinell Hardness
814.00 MPa
11
Not Available
Vickers Hardness
589.00 MPa
19
Not Available
Speed of Sound
2,830.00 m/s
28
Not Available
Optical Properties
Allotropes
No
No
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
Chemical Properties
Chemical Formula
Er
Fl
Isotopes
Known Isotopes
31
8
1
34
Electronegativity
Pauling Electronegativity
1.24
36
Not Available
Allred Rochow Electronegativity
1.11
29
Not Available
Electropositivity
Pauling Electropositivity
2.76
18
Not Available
Ionization Energies
1st Energy Level
589.30 kJ/mol
99+
823.90 kJ/mol
13
2nd Energy Level
1,150.00 kJ/mol
99+
1,601.60 kJ/mol
34
3rd Energy Level
2,194.00 kJ/mol
99+
3,367.30 kJ/mol
18
4th Energy Level
4,120.00 kJ/mol
33
4,399.70 kJ/mol
27
5th Energy Level
Not Available
5,847.00 kJ/mol
26
Electrochemical Equivalent
2.08 g/amp-hr
28
Not Available
Electron Work Function
Not Available
Not Available
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Radioactivity
Atomic Properties
Atomic Number
68
99+
114
4
Electron Configuration
[Xe] 4f12 6s2
[Rn] 5f14 6d10 7s2 7p2
Crystal Structure
Hexagonal Close Packed (HCP)
Not Known
Crystal Lattice
HCP-Crystal-Structure-of-Erbium.jpg#100
Unknown-Crystal-Structure-of-Flerovium.jpg#100
Atom
Number of Protons
68
99+
114
4
Number of Neutrons
99
33
184
1
Number of Electrons
68
99+
114
4
Radius of an Atom
Atomic Radius
176.00 pm
18
180.00 pm
14
Covalent Radius
189.00 pm
19
171.00 pm
24
Atomic Weight
167.26 amu
99+
289.00 amu
3
Atomic Volume
18.40 cm3/mol
25
Not Available
Adjacent Atomic Numbers
Valence Electron Potential
49.00 (-eV)
29
Not Available
Lattice Constant
355.88 pm
39
Not Available
Lattice Angles
π/2, π/2, 2 π/3
Unknown
Lattice C/A Ratio
1.57
17
Not Available
Mechanical Properties
Density
Density At Room Temperature
9.07 g/cm3
99+
14.00 g/cm3
23
Density When Liquid (at m.p.)
8.86 g/cm3
23
Not Available
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)
20
Not Available
Elasticity properties
Shear Modulus
28.30 GPa
25
Not Available
Bulk Modulus
44.40 GPa
27
Not Available
Young's Modulus
69.90 GPa
29
Not Available
Poisson Ratio
0.24
28
Not Available
Other Mechanical Properties
Malleable
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
9.07
32
Not Available
Magnetic Ordering
Paramagnetic
Unknown
Electrical Properties
Electrical Property
Conductor
Unknown
Resistivity
0.86 nΩ·m
99+
Not Available
Electrical Conductivity
0.01 106/cm Ω
99+
Not Available
Electron Affinity
50.00 kJ/mol
21
Not Available
Thermal Properties
Specific Heat
0.17 J/(kg K)
34
Not Available
Molar Heat Capacity
28.12 J/mol·K
11
Not Available
Thermal Conductivity
14.50 W/m·K
99+
Not Available
Critical Temperature
Not Available
Not Available
Thermal Expansion
12.20 µm/(m·K)
31
Not Available
Enthalpy
Enthalpy of Vaporization
261.00 kJ/mol
35
Not Available
Enthalpy of Fusion
17.20 kJ/mol
15
Not Available
Enthalpy of Atomization
314.00 kJ/mol
33
Not Available
Standard Molar Entropy
73.10 J/mol.K
11
Not Available
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