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Pr Element
Praseodymium


Periodic Table
0
Symbol
Pr 0
Group Number
Not Available 0
Period Number
6 2
Block
f block 0
Element Family
Lanthanide 0
CAS Number
7440100 69
Space Group Name
P63/mmc 0
Space Group Number
194.00 5
Facts
0
Interesting Facts
  • Praseodymium metal is synthetically produced metal.
  • Praseodymium is used as possible fuel for radioactive generators.
0
Sources
Found in Minerals, Mining, Ores of Minerals 0
History
0
Who Discovered
Not Available 0
Discovery
In 1885 0
Abundance
0
Abundance In Universe
2 * 10-7 % 22
Abundance In Sun
~0.0000001 % 26
Abundance In Meteorites
0.00 % 40
Abundance In Earth's Crust
0.00 % 27
Abundance In Oceans
0.00 % 39
Abundance In Humans
Not Available 0
Uses
0
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.
0
Industrial Uses
Chemical Industry 0
Medical Uses
NA 0
Other Uses
Alloys 0
Biological Properties
0
Toxicity
Moderately Toxic 0
Present in Human Body
No 0
In Blood
Not Available 0
In Bone
Not Available 0
Physical
0
Melting Point
935.00 °C 48
Boiling Point
3,130.00 °C 27
Appearance
0
Physical State
Solid 0
Color
Grayish White 0
Luster
Metallic 0
Hardness
0
Mohs Hardness
Not Available 0
Brinell Hardness
481.00 MPa 24
Vickers Hardness
400.00 MPa 25
Speed of Sound
2,280.00 m/s 40
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
Not Available 0
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Pr 0
Isotopes
0
Known Isotopes
31 8
Electronegativity
0
Pauling Electronegativity
1.13 42
Sanderson Electronegativity
Not Available 0
Allred Rochow Electronegativity
1.07 32
Mulliken-Jaffe Electronegativity
Not Available 0
Allen Electronegativity
Not Available 0
Electropositivity
0
Pauling Electropositivity
2.87 12
Ionization Energies
0
1st Energy Level
527.00 kJ/mol 78
2nd Energy Level
1,020.00 kJ/mol 80
3rd Energy Level
2,086.00 kJ/mol 70
4th Energy Level
3,761.00 kJ/mol 47
5th Energy Level
5,551.00 kJ/mol 29
6th Energy Level
Not Available 0
7th Energy level
Not Available 0
8th Energy Level
Not Available 0
9th Energy Level
Not Available 0
10th Energy Level
Not Available 0
11th Energy Level
Not Available 0
12th Energy Level
Not Available 0
13th Energy Level
Not Available 0
14th Energy Level
Not Available 0
15th Energy Level
Not Available 0
16th Energy Level
Not Available 0
17th Energy Level
Not Available 0
18th Energy Level
Not Available 0
19th Energy Level
Not Available 0
20th Energy Level
Not Available 0
21st Energy Level
Not Available 0
22nd Energy Level
Not Available 0
23rd Energy Level
Not Available 0
24th Energy Level
Not Available 0
25th Energy Level
Not Available 0
26th Energy Level
Not Available 0
27th Energy Level
Not Available 0
28th Energy Level
Not Available 0
29th Energy Level
Not Available 0
30th Energy Level
Not Available 0
Electrochemical Equivalent
1.75 g/amp-hr 40
Electron Work Function
2.70 eV 41
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes 0
Atomic
0
Atomic Number
59 57
Electron Configuration
[Xe] 4f3 6s2 0
Crystal Structure
Hexagonal Close Packed (HCP) 0
Crystal Lattice
HCP-Crystal-Structure-of-Praseodymium.jpg#100 0
Atom
0
Number of Protons
59 56
Number of Neutrons
82 41
Number of Electrons
59 56
Radius of an Atom
0
Atomic Radius
182.00 pm 11
Covalent Radius
203.00 pm 9
Van der Waals Radius
239.00 pm 14
Atomic Weight
140.91 amu 51
Atomic Volume
20.80 cm3/mol 15
Adjacent Atomic Numbers
0
Previous Element
49 0
Next Element
13 0
Valence Electron Potential
42.64 (-eV) 42
Lattice Constant
367.25 pm 29
Lattice Angles
π/2, π/2, 2 π/3 0
Lattice C/A Ratio
1.61 4
Mechanical
0
Density
0
Density At Room Temperature
6.77 g/cm3 63
Density When Liquid (at m.p.)
6.50 g/cm3 39
Tensile Strength
Not Available 0
Viscosity
Not Available 0
Vapor Pressure
0
Vapor Pressure at 1000 K
0.00 (Pa) 25
Vapor Pressure at 2000 K
13.20 (Pa) 7
Elasticity properties
0
Shear Modulus
14.80 GPa 39
Bulk Modulus
28.80 GPa 40
Young's Modulus
37.30 GPa 41
Poisson Ratio
0.28 16
Other Mechanical Properties
Ductile, Malleable 0
Magnetic
0
Magnetic Characteristics
0
Specific Gravity
6.77 50
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Electrical Properties
0
Electrical Property
Conductor 0
Resistivity
0.70 nΩ·m 65
Electrical Conductivity
0.01 106/cm Ω 50
Electron Affinity
50.00 kJ/mol 21
Thermal
0
Specific Heat
0.19 J/(kg K) 32
Molar Heat Capacity
27.20 J/mol·K 18
Thermal Conductivity
12.50 W/m·K 59
Critical Temperature
Not Available 0
Thermal Expansion
6.70 µm/(m·K) 50
Enthalpy
0
Enthalpy of Vaporization
296.80 kJ/mol 29
Enthalpy of Fusion
6.89 kJ/mol 48
Enthalpy of Atomization
368.00 kJ/mol 24
Standard Molar Entropy
73.20 J/mol.K 10
Summary >>
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