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Praseodymium Properties
Praseodymium


Physical
0
Melting Point
935.00 °C 48
Boiling Point
3,130.00 °C 27
Hardness
0
Mohs Hardness
Not Available 0
Brinell Hardness
481.00 MPa 24
Vickers Hardness
400.00 MPa 25
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
Not Available 0
Speed of Sound
2,280.00 m/s 40
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
Electrochemical Equivalent
1.75 g/amp-hr 40
Electron Work Function
2.70 eV 41
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes 0
Mechanical
0
Density
0
Density At Room Temperature
6.77 g/cm3 63
Density When Liquid (at m.p.)
6.50 g/cm3 39
Vapor Pressure
0
Vapor Pressure at 1000 K
0.00 (Pa) 25
Vapor Pressure at 2000 K
13.20 (Pa) 7
Tensile Strength
Not Available 0
Viscosity
Not Available 0
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
Periodic Table
0
Symbol
Pr 0
Group Number
Not Available 0
Period Number
6 2
Block
f block 0
Element Family
Lanthanide 0
Atomic
0
Atomic Number
59 57
Atomic Weight
140.91 amu 51
Atomic Volume
20.80 cm3/mol 15
Electron Configuration
[Xe] 4f3 6s2 0
Valence Electron Potential
42.64 (-eV) 42
Atom
0
Number of Protons
59 56
Number of Neutrons
82 41
Number of Electrons
59 56
Crystal Structure
Hexagonal Close Packed (HCP) 0
Crystal Lattice
HCP-Crystal-Structure-of-Praseodymium.jpg#100 0
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
Lattice Constant
367.25 pm 29
Lattice Angles
π/2, π/2, 2 π/3 0
Lattice C/A Ratio
1.61 4
Adjacent Atomic Numbers
0
Next Element
13 0
Previous Element
49 0
Magnetic
0
Electrical Properties
0
Resistivity
0.70 nΩ·m 65
Electrical Conductivity
0.01 106/cm Ω 50
Electron Affinity
50.00 kJ/mol 21
Electrical Property
Conductor 0
Magnetic Characteristics
0
Specific Gravity
6.77 50
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Thermal
0
Specific Heat
0.19 J/(kg K) 32
Thermal Conductivity
12.50 W/m·K 59
Critical Temperature
Not Available 0
Molar Heat Capacity
27.20 J/mol·K 18
Thermal Expansion
6.70 µm/(m·K) 50
Standard Molar Entropy
73.20 J/mol.K 10
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
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