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Darmstadtium vs Holmium

Darmstadtium
Holmium
Holmium vs Darmstadtium


Periodic Table
Symbol
Ds  
Ho  
Group Number
10  
8
3  
15
Period Number
7  
6  
Block
d block  
f block  
Element Family
Probably Transition  
Lanthanide  
CAS Number
54083771  
8
7440600  
29
Space Group Name
-  
P63/mmc  
Space Group Number
166.00  
9
194.00  
7
Facts
Interesting Facts
Darmstadtium is a synthetic element that is highly radioactive.  
  • Holmium metal is very soft and malleable.
  • Holmium metal is well known for its corrosion resistivity.
  
Sources
Synthetically Produced  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Gesellschaft für Schwerionenforschung  
Marc Delafontaine  
Discovery
In 1994  
In 1878  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
28
Abundance In Sun
-  
-  
Abundance In Meteorites
0.00 %  
99+
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
  • Currently known uses of Darmstadtium metal are limited to research purpose only. As only few atoms of this metal are produced.
  
  • 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.
  
Industrial Uses
-  
-  
Medical Uses
-  
-  
Other Uses
Research Purposes  
Alloys, Nuclear Research  
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
Boiling Point
0.00 °C  
99+
2,600.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Silvery White  
Luster
Unknown Luster  
Metallic  
Hardness
  
  
Mohs Hardness
6.00  
6
4.00  
11
Brinell Hardness
350.00 MPa  
36
746.00 MPa  
14
Vickers Hardness
500.00 MPa  
35
481.00 MPa  
36
Speed of Sound
5,090.00 m/s  
13
2,760.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
1.67  
29
Reflectivity
50.00 %  
31
67.00 %  
16
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ds  
Ho  
Isotopes
  
  
Known Isotopes
9  
29
34  
5
Electronegativity
  
  
Pauling Electronegativity
1.10  
99+
1.23  
38
Sanderson Electronegativity
1.30  
25
1.23  
30
Allred Rochow Electronegativity
1.10  
31
1.10  
31
Mulliken-Jaffe Electronegativity
1.10  
99+
1.23  
37
Allen Electronegativity
1.10  
99+
1.23  
99+
Electropositivity
  
  
Pauling Electropositivity
2.20  
39
2.77  
17
Ionization Energies
  
  
1st Energy Level
955.20 kJ/mol  
5
581.00 kJ/mol  
99+
2nd Energy Level
1,891.10 kJ/mol  
16
1,140.00 kJ/mol  
99+
3rd Energy Level
3,029.60 kJ/mol  
25
2,204.00 kJ/mol  
99+
4th Energy Level
3,955.90 kJ/mol  
99+
4,100.00 kJ/mol  
99+
5th Energy Level
5,113.70 kJ/mol  
99+
5,810.00 kJ/mol  
99+
6th Energy Level
10,700.00 kJ/mol  
12
5,810.00 kJ/mol  
99+
7th Energy level
3,540.00 kJ/mol  
99+
5,810.00 kJ/mol  
99+
8th Energy Level
6,630.00 kJ/mol  
40
5,810.00 kJ/mol  
99+
9th Energy Level
7,180.00 kJ/mol  
29
6,500.00 kJ/mol  
39
10th Energy Level
10,700.00 kJ/mol  
20
6,500.00 kJ/mol  
99+
11th Energy Level
3,540.00 kJ/mol  
99+
5,810.00 kJ/mol  
99+
12th Energy Level
34,800.00 kJ/mol  
28
5,810.00 kJ/mol  
99+
13th Energy Level
5,280.00 kJ/mol  
99+
5,810.00 kJ/mol  
99+
14th Energy Level
1,130.00 kJ/mol  
99+
5,810.00 kJ/mol  
40
15th Energy Level
34,400.00 kJ/mol  
99+
58,100.00 kJ/mol  
99+
16th Energy Level
34,800.00 kJ/mol  
99+
581.00 kJ/mol  
99+
17th Energy Level
1,139.00 kJ/mol  
18
581.00 kJ/mol  
99+
18th Energy Level
1,080.00 kJ/mol  
99+
5,810.00 kJ/mol  
99+
19th Energy Level
1,139.90 kJ/mol  
15
581.00 kJ/mol  
99+
20th Energy Level
0.00 kJ/mol  
99+
581.00 kJ/mol  
99+
21st Energy Level
1,080.00 kJ/mol  
32
581.00 kJ/mol  
99+
22nd Energy Level
350.00 kJ/mol  
99+
581.00 kJ/mol  
99+
23rd Energy Level
1,100.00 kJ/mol  
35
5,810.00 kJ/mol  
20
24th Energy Level
565.80 kJ/mol  
99+
581.00 kJ/mol  
99+
25th Energy Level
0.00 kJ/mol  
99+
581.00 kJ/mol  
99+
26th Energy Level
582.30 kJ/mol  
99+
581.00 kJ/mol  
99+
27th Energy Level
0.00 kJ/mol  
99+
584.70 kJ/mol  
99+
28th Energy Level
1,130.00 kJ/mol  
4
581.00 kJ/mol  
99+
29th Energy Level
1,130.00 kJ/mol  
4
584.70 kJ/mol  
99+
30th Energy Level
663.20 kJ/mol  
33
581.00 kJ/mol  
99+
Electrochemical Equivalent
3.00 g/amp-hr  
21
2.02 g/amp-hr  
33
Electron Work Function
4.90 eV  
12
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
110  
8
67  
99+
Electron Configuration
[Rn] 5f14 6d8 7s2  
[Xe] 4f11 6s2  
Crystal Structure
Body Centered Cubic (BCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
HCP-Crystal-Structure-of-Holmium.jpg#100  
Atom
  
  
Number of Protons
110  
8
67  
99+
Number of Neutrons
161  
4
98  
35
Number of Electrons
110  
8
67  
99+
Radius of an Atom
  
  
Atomic Radius
132.00 pm  
99+
176.00 pm  
20
Covalent Radius
128.00 pm  
99+
192.00 pm  
17
Van der Waals Radius
0.00 pm  
99+
216.00 pm  
30
Atomic Weight
281.00 amu  
6
164.93 amu  
99+
Atomic Volume
20.50 cm3/mol  
29
18.70 cm3/mol  
36
Adjacent Atomic Numbers
  
  
Previous Element
Meitnerium
  
Dysprosium
  
Next Element
Roentgenium
  
Erbium
  
Valence Electron Potential
0.00 (-eV)  
99+
47.90 (-eV)  
32
Lattice Constant
0.00 pm  
99+
357.73 pm  
99+
Lattice Angles
-  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.61  
19
1.57  
40
Mechanical
Density
  
  
Density At Room Temperature
35.00 g/cm3  
4
8.79 g/cm3  
99+
Density When Liquid (at m.p.)
34.80 g/cm3  
5
8.34 g/cm3  
99+
Tensile Strength
0.10 MPa  
99+
270.00 MPa  
17
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
17
Vapor Pressure at 2000 K
0.00 (Pa)  
37
0.00 (Pa)  
30
Elasticity properties
  
  
Shear Modulus
33.00 GPa  
23
26.30 GPa  
35
Bulk Modulus
38.00 GPa  
99+
40.20 GPa  
37
Young's Modulus
0.00 GPa  
99+
64.80 GPa  
33
Poisson Ratio
0.25  
24
0.23  
29
Other Mechanical Properties
-  
Ductile, Malleable, Sectile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
34.80  
7
8.80  
99+
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
7
Susceptibility
0.00  
24
0.00  
11
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
8.30 nΩ·m  
99+
814.00 nΩ·m  
4
Electrical Conductivity
0.00 106/cm Ω  
99+
0.01 106/cm Ω  
99+
Electron Affinity
-  
50.00 kJ/mol  
26
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.16 J/(kg K)  
36
Molar Heat Capacity
27.30 J/mol·K  
23
27.15 J/mol·K  
25
Thermal Conductivity
0.00 W/m·K  
99+
16.20 W/m·K  
99+
Critical Temperature
1,323.00 K  
99+
1,747.00 K  
34
Thermal Expansion
12.90 µm/(m·K)  
38
11.20 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
348.90 kJ/mol  
34
241.00 kJ/mol  
99+
Enthalpy of Fusion
-  
11.76 kJ/mol  
35
Enthalpy of Atomization
-  
301.00 kJ/mol  
99+
Standard Molar Entropy
57.00 J/mol.K  
30
75.30 J/mol.K  
8
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