Actinium vs Lutetium
Periodic Table
Symbol
Ac
Lu
Group Number
Not Available
Not Available
Period Number
7
6
Block
f block
f block
Element Family
Actinide
Lanthanide
CAS Number
7440348
99+
7439943
99+
Space Group Name
Fm_ 3m
P63/mmc
Space Group Number
225.00
2
194.00
5
Facts
Interesting Facts
Not Available
- Metal dust of Lutetium element is highly explosive.
- Lutetium metal is corrosion resistance and acts stable in air.
Sources
Obtained by Treating Radium with Neutrons, Ores of metals
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Friedrich Oskar Giesel
Georges Urbain and Carl Auer von Welsbach
Discovery
In 1902
In 1906
Abundance
Abundance In Universe
Not Available
1 * 10-8 %
30
Abundance In Sun
~-9999 %
~0.0000001 %
26
Abundance In Meteorites
Not Available
0.00 %
99+
Abundance In Earth's Crust
Not Available
0.00 %
99+
Abundance In Oceans
Not Available
0.00 %
99+
Uses
Uses & Benefits
- Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
- Lutetium metal is used outside research. It has commercial uses like Industrial catalyst for cracking oil refineries of hydrocarbons .
Industrial Uses
NA
NA
Medical Uses
NA
NA
Other Uses
Alloys, Nuclear Research, Research Purposes
Alloys
Biological Properties
Toxicity
Toxic
Low Toxic
Present in Human Body
No
No
In Blood
0.00 Blood/mg dm-3
37
Not Available
In Bone
0.00 p.p.m.
36
Not Available
Physical Properties
Melting Point
1,227.00 °C
38
1,652.00 °C
19
Boiling Point
3,200.00 °C
26
3,402.00 °C
19
Appearance
Physical State
Solid
Solid
Color
Silvery White
Silvery White
Luster
NA
Metallic
Hardness
Brinell Hardness
Not Available
893.00 MPa
10
Vickers Hardness
Not Available
1,160.00 MPa
8
Speed of Sound
Not Available
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
Ac
Lu
Isotopes
Known Isotopes
29
10
35
4
Electronegativity
Pauling Electronegativity
1.10
99+
1.27
34
Allred Rochow Electronegativity
1.00
36
1.14
28
Electropositivity
Pauling Electropositivity
2.90
10
2.73
20
Ionization Energies
1st Energy Level
499.00 kJ/mol
99+
523.50 kJ/mol
99+
2nd Energy Level
1,170.00 kJ/mol
99+
1,340.00 kJ/mol
99+
3rd Energy Level
1,900.00 kJ/mol
99+
2,022.30 kJ/mol
99+
4th Energy Level
4,700.00 kJ/mol
23
4,370.00 kJ/mol
28
5th Energy Level
Not Available
6,445.00 kJ/mol
21
Electrochemical Equivalent
2.82 g/amp-hr
18
2.18 g/amp-hr
23
Electron Work Function
Not Available
3.30 eV
33
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
Atomic Properties
Atomic Number
89
29
71
99+
Electron Configuration
[Rn] 6d1 7s2
[Xe] 6s2 4f14 5d1
Crystal Structure
Face Centered Cubic (FCC)
Hexagonal Close Packed (HCP)
Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
89
29
71
99+
Number of Neutrons
138
16
104
30
Number of Electrons
89
29
71
99+
Radius of an Atom
Atomic Radius
195.00 pm
7
174.00 pm
20
Covalent Radius
Not Available
187.00 pm
20
Van der Waals Radius
Not Available
221.00 pm
22
Atomic Weight
227.00 amu
25
174.97 amu
40
Atomic Volume
22.54 cm3/mol
11
17.78 cm3/mol
30
Adjacent Atomic Numbers
Valence Electron Potential
38.60 (-eV)
99+
50.90 (-eV)
26
Lattice Constant
567.00 pm
8
350.31 pm
99+
Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
Lattice C/A Ratio
Not Available
1.59
10
Mechanical Properties
Density
Density At Room Temperature
10.00 g/cm3
37
9.84 g/cm3
38
Density When Liquid (at m.p.)
Not Available
9.30 g/cm3
22
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
Not Available
0.00 (Pa)
33
Vapor Pressure at 2000 K
Not Available
3.18 (Pa)
11
Elasticity properties
Shear Modulus
Not Available
27.20 GPa
26
Bulk Modulus
Not Available
47.60 GPa
23
Young's Modulus
Not Available
68.60 GPa
30
Poisson Ratio
Not Available
0.26
21
Other Mechanical Properties
NA
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
10.07
28
9.84
29
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Unknown
Conductor
Resistivity
Not Available
582.00 nΩ·m
9
Electrical Conductivity
Not Available
0.02 106/cm Ω
99+
Electron Affinity
Not Available
50.00 kJ/mol
21
Thermal Properties
Specific Heat
0.12 J/(kg K)
40
0.15 J/(kg K)
36
Molar Heat Capacity
27.20 J/mol·K
18
26.86 J/mol·K
24
Thermal Conductivity
12.00 W/m·K
99+
16.40 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
Not Available
9.90 µm/(m·K)
40
Enthalpy
Enthalpy of Vaporization
Not Available
355.90 kJ/mol
22
Enthalpy of Fusion
Not Available
18.70 kJ/mol
13
Enthalpy of Atomization
301.00 kJ/mol
36
398.00 kJ/mol
20
Standard Molar Entropy
56.50 J/mol.K
25
51.00 J/mol.K
30
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