Praseodymium vs Titanium
Periodic Table
Symbol
Pr
Ti
Group Number
Not Available
4
14
Period Number
6
4
Block
f block
d block
Element Family
Lanthanide
Transition Metal
CAS Number
7440100
99+
7440326
99+
Space Group Name
P63/mmc
P63/mmc
Space Group Number
194.00
5
194.00
5
Facts
Interesting Facts
- Praseodymium metal is synthetically produced metal.
- Praseodymium is used as possible fuel for radioactive generators.
- The only metal which burns in Nitrogen is Titanium.
- Titanium is also known as corrosion resistant metal.
Sources
Found in Minerals, Mining, Ores of Minerals
Found in Minerals, Mining
History
Who Discovered
Not Available
W. Gregor & J. Berzelius
Discovery
In 1885
In 1791
Abundance
Abundance In Universe
2 * 10-7 %
22
3 * 10-4 %
9
Abundance In Sun
~0.0000001 %
26
~0.0004 %
9
Abundance In Meteorites
0.00 %
40
0.05 %
11
Abundance In Earth's Crust
0.00 %
27
0.66 %
7
Abundance In Oceans
0.00 %
39
0.00 %
15
Uses
Uses & Benefits
- The main use of Praseodymium include alloys. Praseodymium –Magnesium alloy is used in aircraft engines due to its high strength.
- This metal is also used while making a permanent magnets.
- Its alloys are used in spacecraft, aircraft and ammunition industry.
- Its pipes are used in distillation plants, submarines, hulls of big ships, etc.
Industrial Uses
Chemical Industry
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
Medical Uses
NA
Dentistry, Surgical Instruments Manufacturing
Other Uses
Alloys
Alloys, Jewellery, Sculptures, Statues
Biological Properties
Toxicity
Moderately Toxic
Non Toxic
Present in Human Body
No
Yes
In Blood
Not Available
0.05 Blood/mg dm-3
16
Physical Properties
Melting Point
935.00 °C
99+
1,660.00 °C
18
Boiling Point
3,130.00 °C
27
3,287.00 °C
22
Appearance
Physical State
Solid
Solid
Color
Grayish White
Silvery Gray-White
Luster
Metallic
Metallic
Hardness
Mohs Hardness
Not Available
6.00
6
Brinell Hardness
481.00 MPa
24
716.00 MPa
15
Vickers Hardness
400.00 MPa
25
830.00 MPa
14
Speed of Sound
2,280.00 m/s
40
5,090.00 m/s
9
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
Pr
Ti
Isotopes
Known Isotopes
31
8
23
16
Electronegativity
Pauling Electronegativity
1.13
99+
1.54
26
Sanderson Electronegativity
Not Available
1.09
20
Allred Rochow Electronegativity
1.07
32
1.32
23
Allen Electronegativity
Not Available
1.38
32
Electropositivity
Pauling Electropositivity
2.87
12
2.46
28
Ionization Energies
1st Energy Level
527.00 kJ/mol
99+
658.80 kJ/mol
39
2nd Energy Level
1,020.00 kJ/mol
99+
1,309.80 kJ/mol
99+
3rd Energy Level
2,086.00 kJ/mol
99+
2,652.50 kJ/mol
99+
4th Energy Level
3,761.00 kJ/mol
99+
4,174.60 kJ/mol
32
5th Energy Level
5,551.00 kJ/mol
29
9,581.00 kJ/mol
5
6th Energy Level
Not Available
11,533.00 kJ/mol
6
7th Energy level
Not Available
13,590.00 kJ/mol
6
8th Energy Level
Not Available
16,440.00 kJ/mol
8
9th Energy Level
Not Available
18,530.00 kJ/mol
11
10th Energy Level
Not Available
20,833.00 kJ/mol
15
11th Energy Level
Not Available
25,575.00 kJ/mol
14
12th Energy Level
Not Available
28,125.00 kJ/mol
14
13th Energy Level
Not Available
76,015.00 kJ/mol
1
14th Energy Level
Not Available
83,280.00 kJ/mol
2
15th Energy Level
Not Available
90,880.00 kJ/mol
3
16th Energy Level
Not Available
100,700.00 kJ/mol
4
17th Energy Level
Not Available
109,100.00 kJ/mol
5
18th Energy Level
Not Available
117,800.00 kJ/mol
6
19th Energy Level
Not Available
129,900.00 kJ/mol
7
20th Energy Level
Not Available
137,530.00 kJ/mol
9
Electrochemical Equivalent
1.75 g/amp-hr
40
0.45 g/amp-hr
99+
Electron Work Function
2.70 eV
99+
4.33 eV
17
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes
Chemical Stability, Ionization
Atomic Properties
Atomic Number
59
99+
22
99+
Electron Configuration
[Xe] 4f3 6s2
[Ar] 3d2 4s2
Crystal Structure
Hexagonal Close Packed (HCP)
Hexagonal Close Packed (HCP)
Crystal Lattice
HCP-Crystal-Structure-of-Praseodymium.jpg#100
HCP-Crystal-Structure-of-Titanium.jpg#100
Atom
Number of Protons
59
99+
22
99+
Number of Neutrons
82
99+
26
99+
Number of Electrons
59
99+
22
99+
Radius of an Atom
Atomic Radius
182.00 pm
11
147.00 pm
34
Covalent Radius
203.00 pm
9
160.00 pm
30
Van der Waals Radius
239.00 pm
14
200.00 pm
28
Atomic Weight
140.91 amu
99+
47.87 amu
99+
Atomic Volume
20.80 cm3/mol
15
10.64 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
42.64 (-eV)
99+
95.20 (-eV)
10
Lattice Constant
367.25 pm
29
295.08 pm
99+
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.61
4
Not Available
Mechanical Properties
Density
Density At Room Temperature
6.77 g/cm3
99+
4.51 g/cm3
99+
Density When Liquid (at m.p.)
6.50 g/cm3
39
4.11 g/cm3
99+
Tensile Strength
Not Available
434.00 MPa
9
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)
25
Not Available
Vapor Pressure at 2000 K
13.20 (Pa)
7
0.98 (Pa)
14
Elasticity properties
Shear Modulus
14.80 GPa
39
44.00 GPa
17
Bulk Modulus
28.80 GPa
40
110.00 GPa
15
Young's Modulus
37.30 GPa
99+
116.00 GPa
18
Poisson Ratio
0.28
16
0.32
12
Other Mechanical Properties
Ductile, Malleable
Ductile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
6.77
99+
4.51
99+
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Poor Conductor
Resistivity
0.70 nΩ·m
99+
420.00 nΩ·m
12
Electrical Conductivity
0.01 106/cm Ω
99+
0.02 106/cm Ω
99+
Electron Affinity
50.00 kJ/mol
21
7.60 kJ/mol
37
Thermal Properties
Specific Heat
0.19 J/(kg K)
32
0.52 J/(kg K)
9
Molar Heat Capacity
27.20 J/mol·K
18
25.06 J/mol·K
99+
Thermal Conductivity
12.50 W/m·K
99+
21.90 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
6.70 µm/(m·K)
99+
8.60 µm/(m·K)
99+
Enthalpy
Enthalpy of Vaporization
296.80 kJ/mol
29
429.00 kJ/mol
15
Enthalpy of Fusion
6.89 kJ/mol
99+
15.48 kJ/mol
19
Enthalpy of Atomization
368.00 kJ/mol
24
468.60 kJ/mol
15
Standard Molar Entropy
73.20 J/mol.K
10
27.30 J/mol.K
99+
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