Home
 Compare Metals

Holmium vs Rutherfordium

Holmium
Rutherfordium
Rutherfordium vs Holmium


Periodic Table
Symbol
Ho  
Rf  
Group Number
3  
15
4  
14
Period Number
6  
7  
Block
f block  
d block  
Element Family
Lanthanide  
Transition Metal  
CAS Number
7440600  
29
53850365  
13
Space Group Name
P63/mmc  
-  
Space Group Number
194.00  
7
166.00  
9
Facts
Interesting Facts
  • Holmium metal is very soft and malleable.
  • Holmium metal is well known for its corrosion resistivity.
  
  • Rutherfordium does not occur in nature as it is a synthetic element.
  • Till date Rutherfordium metal has 15 radioisotopes created synthetically.
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Bombarding Plutonium with Accelerated 113 to 115 MeV Neon Ions, Synthetically Produced  
History
  
  
Who Discovered
Marc Delafontaine  
Joint Institute for Nuclear Research  
Discovery
In 1878  
In 1964  
Abundance
  
  
Abundance In Universe
0.00 %  
28
0.00 %  
40
Abundance In Sun
-  
-  
Abundance In Meteorites
0.00 %  
99+
-  
Abundance In Earth's Crust
0.00 %  
38
-  
Abundance In Oceans
0.00 %  
99+
-  
Abundance In Humans
0.00 %  
24
-  
Uses
Uses & Benefits
  • Holmium metal has an ability to absorb neutrons, so this metal is used in nuclear reactors to keep the chain reactions of elements under control.
  • Alloys of Holmium are used to produce Magnet.
  
  • Currently known uses of Rutherfordium metal are limited to research purpose only.
  
Industrial Uses
-  
-  
Medical Uses
-  
-  
Other Uses
Alloys, Nuclear Research  
Alloys, Research Purposes  
Biological Properties
  
  
Toxicity
Low Toxic  
-  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
1,461.00 °C  
30
2,100.00 °C  
11
Boiling Point
2,600.00 °C  
99+
5,500.00 °C  
3
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
-  
Luster
Metallic  
Unknown Luster  
Hardness
  
  
Mohs Hardness
4.00  
11
-  
Brinell Hardness
746.00 MPa  
14
1,300.00 MPa  
9
Vickers Hardness
481.00 MPa  
36
550.00 MPa  
31
Speed of Sound
2,760.00 m/s  
99+
6,100.00 m/s  
5
Optical Properties
  
  
Refractive Index
1.67  
29
1.30  
99+
Reflectivity
67.00 %  
16
65.00 %  
18
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ho  
Rf  
Isotopes
  
  
Known Isotopes
34  
5
13  
26
Electronegativity
  
  
Pauling Electronegativity
1.23  
38
0.00  
99+
Sanderson Electronegativity
1.23  
30
1.90  
13
Allred Rochow Electronegativity
1.10  
31
1.30  
25
Mulliken-Jaffe Electronegativity
1.23  
37
1.30  
33
Allen Electronegativity
1.23  
99+
0.90  
99+
Electropositivity
  
  
Pauling Electropositivity
2.77  
17
2.20  
39
Ionization Energies
  
  
1st Energy Level
581.00 kJ/mol  
99+
579.90 kJ/mol  
99+
2nd Energy Level
1,140.00 kJ/mol  
99+
1,389.40 kJ/mol  
99+
3rd Energy Level
2,204.00 kJ/mol  
99+
2,296.40 kJ/mol  
99+
4th Energy Level
4,100.00 kJ/mol  
99+
3,077.90 kJ/mol  
99+
5th Energy Level
5,810.00 kJ/mol  
99+
5,790.00 kJ/mol  
99+
6th Energy Level
5,810.00 kJ/mol  
99+
11,600.00 kJ/mol  
7
7th Energy level
5,810.00 kJ/mol  
99+
5,800.00 kJ/mol  
99+
8th Energy Level
5,810.00 kJ/mol  
99+
5,800.00 kJ/mol  
99+
9th Energy Level
6,500.00 kJ/mol  
39
5,800.00 kJ/mol  
99+
10th Energy Level
6,500.00 kJ/mol  
99+
5,800.00 kJ/mol  
99+
11th Energy Level
5,810.00 kJ/mol  
99+
5,800.00 kJ/mol  
99+
12th Energy Level
5,810.00 kJ/mol  
99+
5,800.00 kJ/mol  
99+
13th Energy Level
5,810.00 kJ/mol  
99+
5,800.00 kJ/mol  
99+
14th Energy Level
5,810.00 kJ/mol  
40
5,800.00 kJ/mol  
99+
15th Energy Level
58,100.00 kJ/mol  
99+
58,000.00 kJ/mol  
99+
16th Energy Level
581.00 kJ/mol  
99+
58,000.00 kJ/mol  
99+
17th Energy Level
581.00 kJ/mol  
99+
579.90 kJ/mol  
99+
18th Energy Level
5,810.00 kJ/mol  
99+
3,300.00 kJ/mol  
99+
19th Energy Level
581.00 kJ/mol  
99+
579.90 kJ/mol  
99+
20th Energy Level
581.00 kJ/mol  
99+
580.00 kJ/mol  
99+
21st Energy Level
581.00 kJ/mol  
99+
5,800.00 kJ/mol  
21
22nd Energy Level
581.00 kJ/mol  
99+
579.00 kJ/mol  
99+
23rd Energy Level
5,810.00 kJ/mol  
20
5,800.00 kJ/mol  
21
24th Energy Level
581.00 kJ/mol  
99+
579.10 kJ/mol  
99+
25th Energy Level
581.00 kJ/mol  
99+
0.00 kJ/mol  
99+
26th Energy Level
581.00 kJ/mol  
99+
580.00 kJ/mol  
99+
27th Energy Level
584.70 kJ/mol  
99+
580.00 kJ/mol  
99+
28th Energy Level
581.00 kJ/mol  
99+
840.00 kJ/mol  
14
29th Energy Level
584.70 kJ/mol  
99+
580.60 kJ/mol  
99+
30th Energy Level
581.00 kJ/mol  
99+
0.00 kJ/mol  
99+
Electrochemical Equivalent
2.02 g/amp-hr  
33
3.00 g/amp-hr  
21
Electron Work Function
4.90 eV  
12
6.00 eV  
1
Other Chemical Properties
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
67  
99+
104  
14
Electron Configuration
[Xe] 4f11 6s2  
[Rn] 5f14 6d2 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
HCP-Crystal-Structure-of-Holmium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
67  
99+
104  
14
Number of Neutrons
98  
35
157  
8
Number of Electrons
67  
99+
104  
14
Radius of an Atom
  
  
Atomic Radius
176.00 pm  
20
150.00 pm  
35
Covalent Radius
192.00 pm  
17
157.00 pm  
33
Van der Waals Radius
216.00 pm  
30
250.00 pm  
10
Atomic Weight
164.93 amu  
99+
267.00 amu  
11
Atomic Volume
18.70 cm3/mol  
36
23.20 cm3/mol  
15
Adjacent Atomic Numbers
  
  
Previous Element
Dysprosium
  
Lawrencium
  
Next Element
Erbium
  
Dubnium
  
Valence Electron Potential
47.90 (-eV)  
32
6.00 (-eV)  
99+
Lattice Constant
357.73 pm  
99+
-  
Lattice Angles
π/2, π/2, 2 π/3  
-  
Lattice C/A Ratio
1.57  
40
1.60  
22
Mechanical
Density
  
  
Density At Room Temperature
8.79 g/cm3  
99+
23.20 g/cm3  
8
Density When Liquid (at m.p.)
8.34 g/cm3  
99+
23.20 g/cm3  
9
Tensile Strength
270.00 MPa  
17
23.00 MPa  
99+
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
17
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.00 (Pa)  
99+
Elasticity properties
  
  
Shear Modulus
26.30 GPa  
35
23.00 GPa  
99+
Bulk Modulus
40.20 GPa  
37
0.00 GPa  
99+
Young's Modulus
64.80 GPa  
33
12.80 GPa  
99+
Poisson Ratio
0.23  
29
0.30  
14
Other Mechanical Properties
Ductile, Malleable, Sectile  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
8.80  
99+
23.00  
10
Magnetic Ordering
Paramagnetic  
-  
Permeability
0.00 H/m  
7
0.00 H/m  
10
Susceptibility
0.00  
11
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
-  
Resistivity
814.00 nΩ·m  
4
0.29 nΩ·m  
99+
Electrical Conductivity
0.01 106/cm Ω  
99+
0.00 106/cm Ω  
99+
Electron Affinity
50.00 kJ/mol  
26
50.00 kJ/mol  
26
Thermal
Specific Heat
0.16 J/(kg K)  
36
0.27 J/(kg K)  
19
Molar Heat Capacity
27.15 J/mol·K  
25
23.20 J/mol·K  
99+
Thermal Conductivity
16.20 W/m·K  
99+
0.23 W/m·K  
99+
Critical Temperature
1,747.00 K  
34
2,400.00 K  
12
Thermal Expansion
11.20 µm/(m·K)  
99+
23.20 µm/(m·K)  
17
Enthalpy
  
  
Enthalpy of Vaporization
241.00 kJ/mol  
99+
580.00 kJ/mol  
12
Enthalpy of Fusion
11.76 kJ/mol  
35
-  
Enthalpy of Atomization
301.00 kJ/mol  
99+
580.00 kJ/mol  
14
Standard Molar Entropy
75.30 J/mol.K  
8
57.60 J/mol.K  
28
Periodic Table >>
<< All

Compare Lanthanide Series

Lanthanide Series

Lanthanide Series

» More Lanthanide Series

Compare Lanthanide Series

» More Compare Lanthanide Series
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!