Periodic Table
Symbol
Hs
Hf
Group Number
84
0
17
👆🏻
Period Number
76
2
7
👆🏻
Block
d block
d block
Element Family
Transition Metal
Transition Metal
CAS Number
540375797440586
7429905
54386242
👆🏻
Space Group Name
-
P63/mmc
Space Group Number
166.00194.00
11
276
👆🏻
Facts
Interesting Facts
- Hassium metals rate of decay is very high.
- Hassium metals 1st sample was synthesized through a nuclear reaction.
- Hafnium metal is highly reactive, hence not found free in nature.
- Hafnium metal as predicated after Mendeleev finished his periodic table.
Sources
Synthetically Produced
By-product Zirconium Refining
History
Who Discovered
Gesellschaft für Schwerionenforschung
Dirk Coster and George de Hevesy
Discovery
In 1984
In 1922
Abundance
Abundance In Universe
0.00 %0.00 %
0
0.11
👆🏻
Abundance In Sun
-0.00 %
0
0.1
👆🏻
Abundance In Meteorites
0.00 %0.00 %
0
22
👆🏻
Abundance In Earth's Crust
-0.00 %
1E-37
8.1
👆🏻
Abundance In Oceans
-0.00 %
0
1.1
👆🏻
Abundance In Humans
-0.00 %
0
1.4
👆🏻
Uses
Uses & Benefits
- Currently known uses of Hassium metal are limited to research purpose only.
- It has an ability to absorb neutrons and hence it is used to make control rods in nuclear submarines. And this metal is also used in Plasma welding torches.
-
It alloys with iron, titanium and niobium are very useful.
Industrial Uses
-
Ammunition Industry
Medical Uses
-
-
Other Uses
Research Purposes
Alloys, In Nuclear Reactors, Nuclear Research, Research Purposes
Biological Properties
Toxicity
-
Toxic
Present in Human Body
✔
✘
✔
✘
In Blood
0.00 Blood/mg dm-30.00 Blood/mg dm-3
0
1970
👆🏻
In Bone
0.00 p.p.m.0.00 p.p.m.
0
170000
👆🏻
Physical
Melting Point
-2,150.00 °C
-38.83
3410
👆🏻
Boiling Point
0.00 °C5,400.00 °C
0
5660
👆🏻
Appearance
Physical State
Solid
Solid
Color
Silver
Gray
Luster
-
Metallic
Hardness
Mohs Hardness
4.505.50
0.2
8.5
👆🏻
Brinell Hardness
230.00 MPa1,450.00 MPa
0.14
3490
👆🏻
Vickers Hardness
2,450.00 MPa1,520.00 MPa
0
3920
👆🏻
Speed of Sound
2,760.00 m/s3,010.00 m/s
818
16200
👆🏻
Optical Properties
Refractive Index
1.302.00
0.155
3.41
👆🏻
Reflectivity
69.00 %71.00 %
5
97
👆🏻
Allotropes
✔
✘
✔
✘
α Allotropes
-
-
β Allotropes
-
-
γ Allotropes
-
-
Chemical
Chemical Formula
Hs
Hf
Isotopes
Known Isotopes
732
0
38
👆🏻
Electronegativity
Pauling Electronegativity
2.201.30
0
2.6
👆🏻
Sanderson Electronegativity
1.301.30
0.22
2.56
👆🏻
Allred Rochow Electronegativity
1.301.23
0.86
1.9
👆🏻
Mulliken-Jaffe Electronegativity
1.301.30
0.62
2.48
👆🏻
Allen Electronegativity
1.301.16
0.659
2.7
👆🏻
Electropositivity
Pauling Electropositivity
2.002.70
1.46
3.3
👆🏻
Ionization Energies
1st Energy Level
733.30 kJ/mol658.50 kJ/mol
375.7
26130
👆🏻
2nd Energy Level
1,756.00 kJ/mol1,440.00 kJ/mol
392.8
28750
👆🏻
3rd Energy Level
2,827.00 kJ/mol2,250.00 kJ/mol
392.8
34230
👆🏻
4th Energy Level
3,637.50 kJ/mol3,216.00 kJ/mol
375.7
37066
👆🏻
5th Energy Level
4,940.00 kJ/mol6,585.00 kJ/mol
392
97510
👆🏻
6th Energy Level
6,175.10 kJ/mol6,585.00 kJ/mol
1007
105800
👆🏻
7th Energy level
7,535.50 kJ/mol6,580.00 kJ/mol
1007
114300
👆🏻
8th Energy Level
8,857.40 kJ/mol6,580.00 kJ/mol
730
125300
👆🏻
9th Energy Level
5,400.00 kJ/mol6,585.00 kJ/mol
1007
134700
👆🏻
10th Energy Level
6,100.00 kJ/mol6,590.00 kJ/mol
392
144300
👆🏻
11th Energy Level
6,100.00 kJ/mol6,585.00 kJ/mol
392
169988
👆🏻
12th Energy Level
3,500.00 kJ/mol6,580.00 kJ/mol
0
189368
👆🏻
13th Energy Level
4,200.00 kJ/mol6,580.00 kJ/mol
1007
76015
👆🏻
14th Energy Level
1,124.00 kJ/mol658.50 kJ/mol
380
86450
👆🏻
15th Energy Level
68,200.00 kJ/mol65,800.00 kJ/mol
33000
100700
👆🏻
16th Energy Level
32,800.00 kJ/mol658.50 kJ/mol
375.7
109480
👆🏻
17th Energy Level
1,089.00 kJ/mol658.50 kJ/mol
375.7
122200
👆🏻
18th Energy Level
3,300.00 kJ/mol6,585.00 kJ/mol
0
134810
👆🏻
19th Energy Level
1,086.50 kJ/mol658.50 kJ/mol
375.7
148700
👆🏻
20th Energy Level
880.00 kJ/mol658.00 kJ/mol
0
171200
👆🏻
21st Energy Level
1,086.00 kJ/mol658.50 kJ/mol
375.7
179100
👆🏻
22nd Energy Level
350.00 kJ/mol658.00 kJ/mol
330
184900
👆🏻
23rd Energy Level
1,120.00 kJ/mol658.50 kJ/mol
357.6
198800
👆🏻
24th Energy Level
540.90 kJ/mol658.50 kJ/mol
297.3
195200
👆🏻
25th Energy Level
610.00 kJ/mol658.00 kJ/mol
0
121900
👆🏻
26th Energy Level
587.40 kJ/mol658.50 kJ/mol
357.6
127700
👆🏻
27th Energy Level
880.00 kJ/mol658.50 kJ/mol
0
133800
👆🏻
28th Energy Level
840.00 kJ/mol658.50 kJ/mol
297.3
139800
👆🏻
29th Energy Level
867.80 kJ/mol658.50 kJ/mol
0
148100
👆🏻
30th Energy Level
0.00 kJ/mol658.00 kJ/mol
0
154500
👆🏻
Electrochemical Equivalent
3.00 g/amp-hr1.66 g/amp-hr
0.16812
8.3209
👆🏻
Electron Work Function
4.90 eV3.90 eV
2.14
6
👆🏻
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
Atomic
Atomic Number
10872
3
117
👆🏻
Electron Configuration
[Rn] 5f14 6d6 7s2
[Xe] 4f14 5d2 6s2
Crystal Structure
Hexagonal Close Packed (HCP)
Hexagonal Close Packed (HCP)
Crystal Lattice
Atom
Number of Protons
10872
3
117
👆🏻
Number of Neutrons
158106
4
285
👆🏻
Number of Electrons
10872
3
117
👆🏻
Radius of an Atom
Atomic Radius
126.00 pm159.00 pm
0
348
👆🏻
Covalent Radius
134.00 pm175.00 pm
0
260
👆🏻
Van der Waals Radius
0.00 pm200.00 pm
0
348
👆🏻
Atomic Weight
269.00 amu178.49 amu
6.94
294
👆🏻
Atomic Volume
22.70 cm3/mol13.60 cm3/mol
1.39
71.07
👆🏻
Adjacent Atomic Numbers
Previous Element
Next Element
Valence Electron Potential
0.00 (-eV)81.00 (-eV)
0
392.42
👆🏻
Lattice Constant
-319.64 pm
0
891.25
👆🏻
Lattice Angles
-
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.311.58
0.423
1.9
👆🏻
Mechanical
Density
Density At Room Temperature
40.70 g/cm313.31 g/cm3
0.534
40.7
👆🏻
Density When Liquid (at m.p.)
41.00 g/cm312.00 g/cm3
0.512
41
👆🏻
Tensile Strength
80.00 MPa445.00 MPa
0.1
11000
👆🏻
Viscosity
0.000.00
1.5E-05
0.0035
👆🏻
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)0.00 (Pa)
0
121
👆🏻
Vapor Pressure at 2000 K
0.00 (Pa)0.00 (Pa)
0
774
👆🏻
Elasticity properties
Shear Modulus
40.00 GPa30.00 GPa
1.3
222
👆🏻
Bulk Modulus
40.00 GPa110.00 GPa
0
462
👆🏻
Young's Modulus
40.00 GPa78.00 GPa
0
528
👆🏻
Poisson Ratio
0.340.37
0.032
0.47
👆🏻
Other Mechanical Properties
-
Ductile, Malleable
Magnetic
Magnetic Characteristics
Specific Gravity
41.0013.31
0.53
4500
👆🏻
Magnetic Ordering
-
Paramagnetic
Permeability
0.00 H/m0.00 H/m
1.25643E-06
0.0063
👆🏻
Susceptibility
0.000.00
-0.000166
200000
👆🏻
Electrical Properties
Electrical Property
-
Conductor
Resistivity
41.00 nΩ·m331.00 nΩ·m
0.1
961
👆🏻
Electrical Conductivity
0.00 106/cm Ω0.03 106/cm Ω
0
0.63
👆🏻
Electron Affinity
63.20 kJ/mol0.00 kJ/mol
0
222.8
👆🏻
Thermal
Specific Heat
0.13 J/(kg K)0.14 J/(kg K)
0.1
3.6
👆🏻
Molar Heat Capacity
25.92 J/mol·K25.73 J/mol·K
13.1
62.7
👆🏻
Thermal Conductivity
0.00 W/m·K23.00 W/m·K
0
429
👆🏻
Critical Temperature
1,323.00 K2,500.00 K
26.3
3695
👆🏻
Thermal Expansion
21.20 µm/(m·K)5.90 µm/(m·K)
4.5
97
👆🏻
Enthalpy
Enthalpy of Vaporization
126.00 kJ/mol661.10 kJ/mol
7.32
799.1
👆🏻
Enthalpy of Fusion
-25.10 kJ/mol
2.1
35.23
👆🏻
Enthalpy of Atomization
-703.00 kJ/mol
61.5
837
👆🏻
Standard Molar Entropy
57.20 J/mol.K43.60 J/mol.K
9.5
198.1
👆🏻