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Curium Zirconium Comparison


Zirconium Curium 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
  
  

Previous Element
Americium
  
Yttrium
  

Next Element
Berkelium
  
Niobium
  

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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