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Lutetium vs Scandium


Scandium vs Lutetium


Periodic Table

Symbol
Lu   
Sc   

Group Number
Not Available   
3   
15

Period Number
6   
4   

Block
f block   
d block   

Element Family
Lanthanide   
Transition Metal   

CAS Number
7439943   
99+
7440202   
99+

Space Group Name
P63/mmc   
P63/mmc   

Space Group Number
194.00   
5
194.00   
5

Facts

Interesting Facts
  • Metal dust of Lutetium element is highly explosive.
  • Lutetium metal is corrosion resistance and acts stable in air.
  
  • Scandium is known as one of the rare earth elements.
  • Scandium metal found in rare minerals called Wolframite .
  

Sources
Found in Minerals, Mining, Ores of Minerals   
Found in Minerals, Mining, Ores of metals, Ores of Minerals   

History
  
  

Who Discovered
Georges Urbain and Carl Auer von Welsbach   
Lars Fredrik Nilson   

Discovery
In 1906   
In 1879   

Abundance
  
  

Abundance In Universe
1 * 10-8 %   
30
3 * 10-6 %   
15

Abundance In Sun
~0.0000001 %   
26
~0.000004 %   
16

Abundance In Meteorites
0.00 %   
99+
0.00 %   
18

Abundance In Earth's Crust
0.00 %   
99+
0.00 %   
23

Abundance In Oceans
0.00 %   
99+
0.00 %   
32

Uses

Uses & Benefits
  • Lutetium metal is used outside research. It has commercial uses like Industrial catalyst for cracking oil refineries of hydrocarbons .
  
  • Uses of Scandium are limited to research purpose only. However, it has very low density and higher melting point.
  • Its compounds like scandium iodide is used in mercury vapor lamps to produce very bright white light.
  

Industrial Uses
NA   
Electrical Industry, Electronic Industry   

Medical Uses
NA   
NA   

Other Uses
Alloys   
Alloys   

Biological Properties
  
  

Toxicity
Low Toxic   
Non Toxic   

Present in Human Body
No   
Yes   

In Blood
Not Available   
0.01 Blood/mg dm-3   
22

In Bone
Not Available   
0.00 p.p.m.   
34

Physical Properties

Melting Point
1,652.00 °C   
19
1,539.00 °C   
24

Boiling Point
3,402.00 °C   
19
2,832.00 °C   
35

Appearance
  
  

Physical State
Solid   
Solid   

Color
Silvery White   
Silvery White   

Luster
Metallic   
Lustrous   

Hardness
  
  

Brinell Hardness
893.00 MPa   
10
750.00 MPa   
12

Vickers Hardness
1,160.00 MPa   
8
Not Available   

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
Lu   
Sc   

Isotopes
  
  

Known Isotopes
35   
4
13   
26

Electronegativity
  
  

Pauling Electronegativity
1.27   
34
1.36   
29

Sanderson Electronegativity
Not Available   
1.02   
21

Allred Rochow Electronegativity
1.14   
28
1.20   
27

Allen Electronegativity
Not Available   
1.19   
36

Electropositivity
  
  

Pauling Electropositivity
2.73   
20
2.64   
25

Ionization Energies
  
  

1st Energy Level
523.50 kJ/mol   
99+
633.10 kJ/mol   
99+

2nd Energy Level
1,340.00 kJ/mol   
99+
1,235.00 kJ/mol   
99+

3rd Energy Level
2,022.30 kJ/mol   
99+
2,388.60 kJ/mol   
99+

4th Energy Level
4,370.00 kJ/mol   
28
7,090.60 kJ/mol   
6

5th Energy Level
6,445.00 kJ/mol   
21
8,843.00 kJ/mol   
6

6th Energy Level
Not Available   
10,679.00 kJ/mol   
7

7th Energy level
Not Available   
13,310.00 kJ/mol   
8

8th Energy Level
Not Available   
15,250.00 kJ/mol   
11

9th Energy Level
Not Available   
17,370.00 kJ/mol   
14

10th Energy Level
Not Available   
21,726.00 kJ/mol   
13

11th Energy Level
Not Available   
24,102.00 kJ/mol   
16

12th Energy Level
Not Available   
66,320.00 kJ/mol   
2

13th Energy Level
Not Available   
73,010.00 kJ/mol   
2

14th Energy Level
Not Available   
80,160.00 kJ/mol   
3

15th Energy Level
Not Available   
89,490.00 kJ/mol   
4

16th Energy Level
Not Available   
97,400.00 kJ/mol   
5

17th Energy Level
Not Available   
105,600.00 kJ/mol   
6

18th Energy Level
Not Available   
117,000.00 kJ/mol   
7

19th Energy Level
Not Available   
124,270.00 kJ/mol   
8

Electrochemical Equivalent
2.18 g/amp-hr   
23
0.56 g/amp-hr   
99+

Electron Work Function
3.30 eV   
33
3.50 eV   
31

Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Corrosion, Flammable, Ionization, Radioactive Isotopes, Solubility   

Atomic Properties

Atomic Number
71   
99+
21   
99+

Electron Configuration
[Xe] 6s2 4f14 5d1   
[Ar] 3d1 4s2   

Crystal Structure
Hexagonal Close Packed (HCP)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
HCP-Crystal-Structure-of-Scandium.jpg#100   

Atom
  
  

Number of Protons
71   
99+
21   
99+

Number of Neutrons
104   
30
24   
99+

Number of Electrons
71   
99+
21   
99+

Radius of an Atom
  
  

Atomic Radius
174.00 pm   
20
162.00 pm   
26

Covalent Radius
187.00 pm   
20
170.00 pm   
25

Van der Waals Radius
221.00 pm   
22
211.00 pm   
25

Atomic Weight
174.97 amu   
40
44.96 amu   
99+

Atomic Volume
17.78 cm3/mol   
30
15.00 cm3/mol   
34

Adjacent Atomic Numbers
  
  

Previous Element
Ytterbium
  
Calcium
  

Next Element
Hafnium
  
Titanium
  

Valence Electron Potential
50.90 (-eV)   
26
58.00 (-eV)   
24

Lattice Constant
350.31 pm   
99+
330.90 pm   
99+

Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   

Lattice C/A Ratio
1.59   
10
1.59   
7

Mechanical Properties

Density
  
  

Density At Room Temperature
9.84 g/cm3   
38
2.99 g/cm3   
99+

Density When Liquid (at m.p.)
9.30 g/cm3   
22
2.80 g/cm3   
99+

Tensile Strength
Not Available   
Not Available   

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Vapor Pressure at 1000 K
0.00 (Pa)   
33
0.00 (Pa)   
22

Vapor Pressure at 2000 K
3.18 (Pa)   
11
91.30 (Pa)   
3

Elasticity properties
  
  

Shear Modulus
27.20 GPa   
26
29.10 GPa   
24

Bulk Modulus
47.60 GPa   
23
56.60 GPa   
21

Young's Modulus
68.60 GPa   
30
74.40 GPa   
26

Poisson Ratio
0.26   
21
0.28   
18

Other Mechanical Properties
NA   
NA   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
9.84   
29
2.99   
99+

Magnetic Ordering
Paramagnetic   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
Conductor   
Conductor   

Resistivity
582.00 nΩ·m   
9
562.00 nΩ·m   
10

Electrical Conductivity
0.02 106/cm Ω   
99+
0.02 106/cm Ω   
99+

Electron Affinity
50.00 kJ/mol   
21
18.10 kJ/mol   
33

Thermal Properties

Specific Heat
0.15 J/(kg K)   
36
0.60 J/(kg K)   
8

Molar Heat Capacity
26.86 J/mol·K   
24
25.52 J/mol·K   
37

Thermal Conductivity
16.40 W/m·K   
99+
15.80 W/m·K   
99+

Critical Temperature
Not Available   
Not Available   

Thermal Expansion
9.90 µm/(m·K)   
40
10.20 µm/(m·K)   
39

Enthalpy
  
  

Enthalpy of Vaporization
355.90 kJ/mol   
22
314.20 kJ/mol   
28

Enthalpy of Fusion
18.70 kJ/mol   
13
14.10 kJ/mol   
25

Enthalpy of Atomization
398.00 kJ/mol   
20
343.00 kJ/mol   
28

Standard Molar Entropy
51.00 J/mol.K   
30
34.60 J/mol.K   
99+

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