Curium Zirconium Comparison
Periodic Table
Symbol
Cm
Zr
Group Number
Not Available
4
14
Period Number
7
5
Block
f block
d block
Element Family
Actinide
Transition Metal
CAS Number
7440519
36
7440677
23
Space Group Name
Not Available
P63/mmc
Space Group Number
Not Available
194.00
5
Facts
Interesting Facts
- Curium metal does not occur free in nature.
- Curium metal is a synthetically produced metal.
- Zirconium metal can resist to weak acids.
- Zirconium metal reacts with oxygen and nitrogen in the atmosphere.
Sources
Bombarding Plutonium with Helium Ions
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso
Martin Heinrich Klaproth
Discovery
In 1944
In 1789
Abundance
Abundance In Universe
Not Available
5 * 10-6 %
13
Abundance In Sun
~-9999 %
~0.000004 %
16
Abundance In Meteorites
Not Available
0.00 %
17
Abundance In Earth's Crust
Not Available
0.01 %
14
Abundance In Oceans
Not Available
0.00 %
23
Abundance In Humans
Not Available
0.00 %
15
Uses
Uses & Benefits
- Curium metal is used to provide power to electrical equipment for space missions.
- As this metal does not absorb neutrons; It is used in nuclear power stations.
- Its oxide is used in ultra strong ceramics. It is also used in manufacturing Crucibles.
Industrial Uses
NA
Aerospace Industry, Ammunition Industry
Medical Uses
NA
NA
Other Uses
Research Purposes
Alloys, Nuclear Research, Research Purposes
Biological Properties
Toxicity
Unknown
NA
Present in Human Body
No
Yes
In Blood
0.00 Blood/mg dm-3
37
0.01 Blood/mg dm-3
21
In Bone
0.00 p.p.m.
36
0.10 p.p.m.
23
Physical Properties
Melting Point
1,340.00 °C
34
1,852.00 °C
15
Boiling Point
3,110.00 °C
30
4,377.00 °C
11
Appearance
Physical State
Solid
Solid
Color
Silver
Silvery White
Luster
Metallic
Lustrous
Hardness
Mohs Hardness
Not Available
5.00
8
Brinell Hardness
Not Available
638.00 MPa
19
Vickers Hardness
Not Available
820.00 MPa
15
Speed of Sound
Not Available
3,800.00 m/s
20
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
Cm
Zr
Isotopes
Known Isotopes
15
24
24
15
Electronegativity
Pauling Electronegativity
1.30
32
1.33
30
Sanderson Electronegativity
Not Available
0.90
25
Allred Rochow Electronegativity
1.20
27
1.22
26
Allen Electronegativity
Not Available
1.32
34
Electropositivity
Pauling Electropositivity
2.70
22
2.67
24
Ionization Energies
1st Energy Level
581.00 kJ/mol
99+
640.10 kJ/mol
99+
2nd Energy Level
1,196.00 kJ/mol
99+
1,270.00 kJ/mol
99+
3rd Energy Level
2,026.00 kJ/mol
99+
2,218.00 kJ/mol
99+
4th Energy Level
3,550.00 kJ/mol
99+
3,313.00 kJ/mol
99+
5th Energy Level
Not Available
7,752.00 kJ/mol
10
6th Energy Level
Not Available
9,500.00 kJ/mol
15
Electrochemical Equivalent
3.07 g/amp-hr
16
0.85 g/amp-hr
99+
Electron Work Function
Not Available
4.05 eV
26
Other Chemical Properties
Ionization, Radioactive Isotopes
Anti Corrosion, Flammable, Ionization, Radioactive Isotopes, Solubility
Atomic Properties
Atomic Number
96
22
40
99+
Electron Configuration
[Rn] 5f7 6d1 7s2
[Kr] 4d2 5s2
Crystal Structure
Double Hexagonal Close Packed (DHCP)
Hexagonal Close Packed (HCP)
Crystal Lattice
DHCP-Crystal-Structure-of-Curium.jpg#100
HCP-Crystal-Structure-of-Zirconium.jpg#100
Atom
Number of Protons
96
22
40
99+
Number of Neutrons
151
10
51
99+
Number of Electrons
96
22
40
99+
Radius of an Atom
Atomic Radius
174.00 pm
20
160.00 pm
27
Covalent Radius
169.00 pm
26
175.00 pm
23
Van der Waals Radius
200.00 pm
28
200.00 pm
28
Atomic Weight
247.00 amu
18
91.22 amu
99+
Atomic Volume
18.28 cm3/mol
26
14.10 cm3/mol
36
Adjacent Atomic Numbers
Valence Electron Potential
44.50 (-eV)
38
80.00 (-eV)
18
Lattice Constant
Not Available
323.20 pm
99+
Lattice Angles
NA
π/2, π/2, 2 π/3
Lattice C/A Ratio
Not Available
1.59
8
Mechanical Properties
Density
Density At Room Temperature
13.51 g/cm3
25
6.52 g/cm3
99+
Density When Liquid (at m.p.)
13.85 g/cm3
10
5.80 g/cm3
99+
Tensile Strength
Not Available
330.00 MPa
12
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
Not Available
0.00 (Pa)
21
Elasticity properties
Shear Modulus
Not Available
33.00 GPa
20
Bulk Modulus
Not Available
91.10 GPa
17
Young's Modulus
Not Available
88.00 GPa
22
Poisson Ratio
Not Available
0.34
10
Other Mechanical Properties
Unknown
Ductile, Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
13.51
17
6.51
99+
Magnetic Ordering
Antiferromagnetic
Paramagnetic
Electrical Properties
Electrical Property
Unknown
Conductor
Resistivity
1.25 nΩ·m
99+
421.00 nΩ·m
11
Electrical Conductivity
Not Available
0.02 106/cm Ω
99+
Electron Affinity
Not Available
41.10 kJ/mol
27
Thermal Properties
Specific Heat
Not Available
0.27 J/(kg K)
19
Molar Heat Capacity
Not Available
25.36 J/mol·K
99+
Thermal Conductivity
Not Available
22.60 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
Not Available
5.70 µm/(m·K)
99+
Enthalpy
Enthalpy of Vaporization
Not Available
581.60 kJ/mol
9
Enthalpy of Fusion
15.00 kJ/mol
21
20.90 kJ/mol
11
Enthalpy of Atomization
Not Available
598.00 kJ/mol
10
Standard Molar Entropy
Not Available
39.00 J/mol.K
39
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