Symbol
Zr
  
Ca
  
Period Number
5
  
4
  
Block
d block
  
s block
  
Element Family
Transition Metal
  
Alkaline Earth
  
Space Group Name
P63/mmc
  
Fm_ 3m
  
Interesting Facts
- Zirconium metal can resist to weak acids.
- Zirconium metal reacts with oxygen and nitrogen in the atmosphere.
  
- Calcium ranks 5th rank in the list of earth’s abundance Percentage.
- It is found in the compound state.
- Gypsum or calcium sulfate is used as plaster and plaster of paris.
  
Sources
Found in Minerals, Mining, Ores of Minerals
  
Earth's crust, Found in Minerals, Mining, Ores of Minerals
  
History
  
  
Who Discovered
Martin Heinrich Klaproth
  
Humphry Davy
  
Discovery
In 1789
  
In 1808
  
Abundance
  
  
Abundance In Sun
~0.000004 %
  
16
Abundance In Earth's Crust
Uses & Benefits
- 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.
  
- It is used as a reducing agent while preparing metals like thorium and uranium. It is also used as an alloying agent for metals such as aluminum, copper & lead.
- Calcium carbonate or lime stone is used in cement.
  
Industrial Uses
Aerospace Industry, Ammunition Industry
  
Chemical Industry
  
Medical Uses
NA
  
Dentistry, Pharmaceutical Industry
  
Other Uses
Alloys, Nuclear Research, Research Purposes
  
Alloys
  
Biological Properties
  
  
Toxicity
NA
  
Non Toxic
  
Present in Human Body
Yes
  
Yes
  
In Blood
0.01 Blood/mg dm-3
  
21
60.50 Blood/mg dm-3
  
4
In Bone
0.10 p.p.m.
  
23
170,000.00 p.p.m.
  
1
Melting Point
1,852.00 °C
  
15
Boiling Point
4,377.00 °C
  
11
1,484.00 °C
  
99+
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silvery White
  
Gray
  
Luster
Lustrous
  
NA
  
Hardness
  
  
Brinell Hardness
170.00 MPa
  
99+
Vickers Hardness
Not Available
  
Speed of Sound
3,800.00 m/s
  
20
3,810.00 m/s
  
19
Optical Properties
  
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Zr
  
Ca
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
640.10 kJ/mol
  
99+
589.80 kJ/mol
  
99+
2nd Energy Level
1,270.00 kJ/mol
  
99+
1,145.40 kJ/mol
  
99+
3rd Energy Level
2,218.00 kJ/mol
  
99+
4,912.40 kJ/mol
  
7
4th Energy Level
3,313.00 kJ/mol
  
99+
6,491.00 kJ/mol
  
7
5th Energy Level
7,752.00 kJ/mol
  
10
8,153.00 kJ/mol
  
7
6th Energy Level
9,500.00 kJ/mol
  
15
10,496.00 kJ/mol
  
8
7th Energy level
Not Available
  
12,270.00 kJ/mol
  
12
8th Energy Level
Not Available
  
14,206.00 kJ/mol
  
15
9th Energy Level
Not Available
  
18,191.00 kJ/mol
  
12
10th Energy Level
Not Available
  
20,385.00 kJ/mol
  
16
11th Energy Level
Not Available
  
57,110.00 kJ/mol
  
3
12th Energy Level
Not Available
  
63,410.00 kJ/mol
  
3
13th Energy Level
Not Available
  
70,110.00 kJ/mol
  
3
14th Energy Level
Not Available
  
78,890.00 kJ/mol
  
4
15th Energy Level
Not Available
  
86,310.00 kJ/mol
  
5
16th Energy Level
Not Available
  
94,000.00 kJ/mol
  
6
17th Energy Level
Not Available
  
104,900.00 kJ/mol
  
7
18th Energy Level
Not Available
  
111,711.00 kJ/mol
  
8
Electrochemical Equivalent
0.85 g/amp-hr
  
99+
0.75 g/amp-hr
  
99+
Other Chemical Properties
Anti Corrosion, Flammable, Ionization, Radioactive Isotopes, Solubility
  
Chemical Stability, Flammability, Ionization, Solubility
  
Electron Configuration
[Kr] 4d2 5s2
  
[Ar] 4s2
  
Crystal Structure
Hexagonal Close Packed (HCP)
  
Face Centered Cubic (FCC)
  
Crystal Lattice
HCP-Crystal-Structure-of-Zirconium.jpg#100
  
FCC-Crystal-Structure-of-Calcium.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Volume
14.10 cm3/mol
  
36
29.90 cm3/mol
  
7
Adjacent Atomic Numbers
  
  
Valence Electron Potential
80.00 (-eV)
  
18
29.00 (-eV)
  
99+
Lattice Angles
π/2, π/2, 2 π/3
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Density
  
  
Density At Room Temperature
6.52 g/cm3
  
99+
1.55 g/cm3
  
99+
Density When Liquid (at m.p.)
5.80 g/cm3
  
99+
1.38 g/cm3
  
99+
Tensile Strength
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Vapor Pressure at 2000 K
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
Ductile, Malleable
  
NA
  
Magnetic Characteristics
  
  
Magnetic Ordering
Paramagnetic
  
Diamagnetic
  
Electrical Properties
  
  
Electrical Property
Conductor
  
Conductor
  
Resistivity
421.00 nΩ·m
  
11
33.60 nΩ·m
  
99+
Electrical Conductivity
0.02 106/cm Ω
  
99+
0.30 106/cm Ω
  
6
Electron Affinity
41.10 kJ/mol
  
27
2.37 kJ/mol
  
39
Specific Heat
0.27 J/(kg K)
  
19
0.63 J/(kg K)
  
7
Molar Heat Capacity
25.36 J/mol·K
  
99+
25.93 J/mol·K
  
34
Thermal Conductivity
22.60 W/m·K
  
99+
201.00 W/m·K
  
5
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
5.70 µm/(m·K)
  
99+
22.30 µm/(m·K)
  
19
Enthalpy
  
  
Enthalpy of Vaporization
581.60 kJ/mol
  
9
150.00 kJ/mol
  
99+
Enthalpy of Fusion
20.90 kJ/mol
  
11
8.54 kJ/mol
  
99+
Enthalpy of Atomization
598.00 kJ/mol
  
10
184.00 kJ/mol
  
99+
Standard Molar Entropy
39.00 J/mol.K
  
39
41.60 J/mol.K
  
36