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Holmium vs Yttrium

Holmium
Yttrium
Yttrium vs Holmium


Periodic Table
Symbol
Ho  
Y  
Group Number
3  
15
3  
15
Period Number
6  
5  
Block
f block  
d block  
Element Family
Lanthanide  
Transition Metal  
CAS Number
7440600  
29
7440655  
25
Space Group Name
P63/mmc  
P63/mmc  
Space Group Number
194.00  
7
194.00  
7
Facts
Interesting Facts
  • Holmium metal is very soft and malleable.
  • Holmium metal is well known for its corrosion resistivity.
  
  • Yttrium Metal is highly toxic.
  • Yttrium Metal is highly reactive in nature hence not found free in nature.
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Marc Delafontaine  
Johan Gadolin  
Discovery
In 1878  
In 1794  
Abundance
  
  
Abundance In Universe
0.00 %  
28
0.00 %  
18
Abundance In Sun
-  
0.00 %  
26
Abundance In Meteorites
0.00 %  
99+
0.00 %  
21
Abundance In Earth's Crust
0.00 %  
38
0.00 %  
22
Abundance In Oceans
0.00 %  
99+
0.00 %  
25
Abundance In Humans
0.00 %  
24
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.
  
  • Yttrium metal is used in different alloys, as it increases the strength of aluminum Magnesium alloy. It is used for radar microwave filter.
  • It is also used as a catalyst in ethene polymerisation.
  
Industrial Uses
-  
Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
Alloys, Nuclear Research  
Alloys  
Biological Properties
  
  
Toxicity
Low Toxic  
Highly Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
26
In Bone
0.00 p.p.m.  
99+
0.07 p.p.m.  
30
Physical
Melting Point
1,461.00 °C  
30
1,523.00 °C  
27
Boiling Point
2,600.00 °C  
99+
3,337.00 °C  
22
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
Metallic  
-  
Hardness
  
  
Mohs Hardness
4.00  
11
4.00  
11
Brinell Hardness
746.00 MPa  
14
589.00 MPa  
26
Vickers Hardness
481.00 MPa  
36
590.00 MPa  
29
Speed of Sound
2,760.00 m/s  
99+
3,300.00 m/s  
34
Optical Properties
  
  
Refractive Index
1.67  
29
1.90  
18
Reflectivity
67.00 %  
16
83.00 %  
6
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ho  
Y  
Isotopes
  
  
Known Isotopes
34  
5
19  
20
Electronegativity
  
  
Pauling Electronegativity
1.23  
38
1.22  
39
Sanderson Electronegativity
1.23  
30
0.65  
99+
Allred Rochow Electronegativity
1.10  
31
1.11  
30
Mulliken-Jaffe Electronegativity
1.23  
37
1.22  
38
Allen Electronegativity
1.23  
99+
1.12  
99+
Electropositivity
  
  
Pauling Electropositivity
2.77  
17
2.78  
16
Ionization Energies
  
  
1st Energy Level
581.00 kJ/mol  
99+
600.00 kJ/mol  
99+
2nd Energy Level
1,140.00 kJ/mol  
99+
1,180.00 kJ/mol  
99+
3rd Energy Level
2,204.00 kJ/mol  
99+
1,980.00 kJ/mol  
99+
4th Energy Level
4,100.00 kJ/mol  
99+
5,847.00 kJ/mol  
19
5th Energy Level
5,810.00 kJ/mol  
99+
7,430.00 kJ/mol  
22
6th Energy Level
5,810.00 kJ/mol  
99+
8,970.00 kJ/mol  
23
7th Energy level
5,810.00 kJ/mol  
99+
11,190.00 kJ/mol  
18
8th Energy Level
5,810.00 kJ/mol  
99+
12,450.00 kJ/mol  
18
9th Energy Level
6,500.00 kJ/mol  
39
14,110.00 kJ/mol  
19
10th Energy Level
6,500.00 kJ/mol  
99+
18,400.00 kJ/mol  
17
11th Energy Level
5,810.00 kJ/mol  
99+
19,900.00 kJ/mol  
18
12th Energy Level
5,810.00 kJ/mol  
99+
36,090.00 kJ/mol  
25
13th Energy Level
5,810.00 kJ/mol  
99+
6,000.00 kJ/mol  
99+
14th Energy Level
5,810.00 kJ/mol  
40
6,000.00 kJ/mol  
33
15th Energy Level
58,100.00 kJ/mol  
99+
60,000.00 kJ/mol  
99+
16th Energy Level
581.00 kJ/mol  
99+
60,000.00 kJ/mol  
34
17th Energy Level
581.00 kJ/mol  
99+
600.00 kJ/mol  
99+
18th Energy Level
5,810.00 kJ/mol  
99+
6,000.00 kJ/mol  
99+
19th Energy Level
581.00 kJ/mol  
99+
600.00 kJ/mol  
99+
20th Energy Level
581.00 kJ/mol  
99+
600.00 kJ/mol  
99+
21st Energy Level
581.00 kJ/mol  
99+
600.00 kJ/mol  
99+
22nd Energy Level
581.00 kJ/mol  
99+
600.00 kJ/mol  
99+
23rd Energy Level
5,810.00 kJ/mol  
20
600.00 kJ/mol  
99+
24th Energy Level
581.00 kJ/mol  
99+
600.00 kJ/mol  
99+
25th Energy Level
581.00 kJ/mol  
99+
600.00 kJ/mol  
99+
26th Energy Level
581.00 kJ/mol  
99+
604.50 kJ/mol  
99+
27th Energy Level
584.70 kJ/mol  
99+
604.50 kJ/mol  
99+
28th Energy Level
581.00 kJ/mol  
99+
604.50 kJ/mol  
99+
29th Energy Level
584.70 kJ/mol  
99+
604.50 kJ/mol  
99+
30th Energy Level
581.00 kJ/mol  
99+
604.50 kJ/mol  
99+
Electrochemical Equivalent
2.02 g/amp-hr  
33
1.11 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
3.10 eV  
99+
Other Chemical Properties
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Chemical Stability, Flammable, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
67  
99+
39  
99+
Electron Configuration
[Xe] 4f11 6s2  
[Kr] 4d1 5s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
HCP-Crystal-Structure-of-Holmium.jpg#100  
HCP-Crystal-Structure-of-Yttrium.jpg#100  
Atom
  
  
Number of Protons
67  
99+
39  
99+
Number of Neutrons
98  
35
50  
99+
Number of Electrons
67  
99+
39  
99+
Radius of an Atom
  
  
Atomic Radius
176.00 pm  
20
180.00 pm  
16
Covalent Radius
192.00 pm  
17
190.00 pm  
18
Van der Waals Radius
216.00 pm  
30
200.00 pm  
35
Atomic Weight
164.93 amu  
99+
88.91 amu  
99+
Atomic Volume
18.70 cm3/mol  
36
19.80 cm3/mol  
33
Adjacent Atomic Numbers
  
  
Previous Element
Dysprosium
  
Strontium
  
Next Element
Erbium
  
Zirconium
  
Valence Electron Potential
47.90 (-eV)  
32
48.00 (-eV)  
31
Lattice Constant
357.73 pm  
99+
364.74 pm  
34
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.57  
40
1.57  
39
Mechanical
Density
  
  
Density At Room Temperature
8.79 g/cm3  
99+
4.47 g/cm3  
99+
Density When Liquid (at m.p.)
8.34 g/cm3  
99+
4.24 g/cm3  
99+
Tensile Strength
270.00 MPa  
17
160.00 MPa  
22
Viscosity
0.00  
25
0.00  
18
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
17
0.00 (Pa)  
34
Vapor Pressure at 2000 K
0.00 (Pa)  
30
4.27 (Pa)  
10
Elasticity properties
  
  
Shear Modulus
26.30 GPa  
35
25.60 GPa  
37
Bulk Modulus
40.20 GPa  
37
41.20 GPa  
35
Young's Modulus
64.80 GPa  
33
63.50 GPa  
34
Poisson Ratio
0.23  
29
0.24  
26
Other Mechanical Properties
Ductile, Malleable, Sectile  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
8.80  
99+
4.47  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
7
0.00 H/m  
18
Susceptibility
0.00  
11
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
814.00 nΩ·m  
4
596.00 nΩ·m  
8
Electrical Conductivity
0.01 106/cm Ω  
99+
0.02 106/cm Ω  
99+
Electron Affinity
50.00 kJ/mol  
26
29.60 kJ/mol  
36
Thermal
Specific Heat
0.16 J/(kg K)  
36
0.30 J/(kg K)  
18
Molar Heat Capacity
27.15 J/mol·K  
25
26.53 J/mol·K  
35
Thermal Conductivity
16.20 W/m·K  
99+
17.20 W/m·K  
99+
Critical Temperature
1,747.00 K  
34
1,799.00 K  
31
Thermal Expansion
11.20 µm/(m·K)  
99+
10.60 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
241.00 kJ/mol  
99+
393.00 kJ/mol  
25
Enthalpy of Fusion
11.76 kJ/mol  
35
17.15 kJ/mol  
16
Enthalpy of Atomization
301.00 kJ/mol  
99+
418.00 kJ/mol  
23
Standard Molar Entropy
75.30 J/mol.K  
8
44.40 J/mol.K  
99+
Periodic Table >>
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