Dysprosium vs Rhodium
Periodic Table
Symbol
Dy
Rh
Group Number
Not Available
9
9
Period Number
6
5
Block
f block
d block
Element Family
Lanthanide
Transition Metal
CAS Number
7429916
99+
7440166
99+
Space Group Name
P63/mmc
Fm_ 3m
Space Group Number
194.00
5
225.00
2
Facts
Interesting Facts
- Dysprosium acts stable in air at room temperature.
- Dysprosium behaves very much like paramagnetic metal.
- Rhodium is the rarest element out of all non-radioactive metals on the earth .
- Rhodium is one of the most durable and hard metal, which also have high reflectance.
Sources
Found in Minerals, Mining, Ores of Minerals
Earth's crust, Found As a By-product, Found in Minerals, Mining
History
Who Discovered
Lecoq de Boisbaudran
William Hyde Wollaston
Discovery
In 1886
In 1804
Abundance
Abundance In Universe
2 * 10-7 %
22
6 * 10-8 %
26
Abundance In Sun
~0.0000002 %
25
~0.0000002 %
25
Abundance In Meteorites
0.00 %
33
0.00 %
36
Abundance In Earth's Crust
0.00 %
28
0.00 %
99+
Abundance In Oceans
0.00 %
35
Not Available
Uses
Uses & Benefits
- Dysprosium metal is highly reactive due to which it pure form is not as usual as its alloy.
- Thi metals alloy is used in magnate as it is resistance to high temperature.
- Rhodium metal is mainly used in catalytic converters for cars as it reduces nitrogen oxides in exhaust gases.
- It is used as an industrial catalyst for nitric acid, acetic acid, hydrogenation reaction, etc.
Industrial Uses
NA
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry
Medical Uses
NA
NA
Other Uses
Alloys, Nuclear Research
Alloys
Biological Properties
Toxicity
Mildly Toxic
NA
Present in Human Body
No
No
Physical Properties
Melting Point
1,407.00 °C
32
1,966.00 °C
12
Boiling Point
2,562.00 °C
99+
3,727.00 °C
17
Appearance
Physical State
Solid
Solid
Color
Silvery White
Silvery White
Luster
Metallic
Metallic
Hardness
Mohs Hardness
Not Available
6.00
6
Brinell Hardness
500.00 MPa
23
980.00 MPa
9
Vickers Hardness
540.00 MPa
20
1,100.00 MPa
9
Speed of Sound
2,710.00 m/s
33
4,700.00 m/s
15
Optical Properties
Reflectivity
Not Available
84.00 %
4
Allotropes
No
No
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
Chemical Properties
Chemical Formula
Dy
Rh
Isotopes
Known Isotopes
29
10
16
23
Electronegativity
Pauling Electronegativity
1.22
38
2.28
3
Allred Rochow Electronegativity
1.10
30
1.45
16
Allen Electronegativity
Not Available
1.56
24
Electropositivity
Pauling Electropositivity
2.78
16
1.72
99+
Ionization Energies
1st Energy Level
573.00 kJ/mol
99+
719.70 kJ/mol
29
2nd Energy Level
1,130.00 kJ/mol
99+
1,740.00 kJ/mol
26
3rd Energy Level
2,200.00 kJ/mol
99+
2,997.00 kJ/mol
27
4th Energy Level
3,990.00 kJ/mol
37
Not Available
Electrochemical Equivalent
2.02 g/amp-hr
29
1.28 g/amp-hr
99+
Electron Work Function
Not Available
4.98 eV
6
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
Anti Corrosion, Ionization, Radioactive Isotopes
Atomic Properties
Atomic Number
66
99+
45
99+
Electron Configuration
[Xe] 4f9 6s2
[Kr] 4d8 5s1
Crystal Structure
Hexagonal Close Packed (HCP)
Face Centered Cubic (FCC)
Crystal Lattice
HCP-Crystal-Structure-of-Dysprosium.jpg#100
FCC-Crystal-Structure-of-Rhodium.jpg#100
Atom
Number of Protons
66
99+
45
99+
Number of Neutrons
96
35
58
99+
Number of Electrons
66
99+
45
99+
Radius of an Atom
Atomic Radius
178.00 pm
16
134.00 pm
99+
Covalent Radius
192.00 pm
17
142.00 pm
99+
Van der Waals Radius
229.00 pm
20
200.00 pm
28
Atomic Weight
162.50 amu
99+
102.91 amu
99+
Atomic Volume
19.00 cm3/mol
23
8.30 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
47.40 (-eV)
32
64.00 (-eV)
22
Lattice Constant
359.30 pm
37
380.34 pm
27
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
Lattice C/A Ratio
1.57
15
Not Available
Mechanical Properties
Density
Density At Room Temperature
8.54 g/cm3
99+
12.41 g/cm3
28
Density When Liquid (at m.p.)
8.37 g/cm3
25
10.70 g/cm3
14
Tensile Strength
120.00 MPa
15
951.00 MPa
5
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
Not Available
0.02 (Pa)
19
Elasticity properties
Shear Modulus
24.70 GPa
31
150.00 GPa
6
Bulk Modulus
40.50 GPa
31
275.00 GPa
5
Young's Modulus
61.40 GPa
33
380.00 GPa
5
Poisson Ratio
0.25
25
0.26
22
Other Mechanical Properties
Sectile
Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
8.55
38
12.41
20
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
926.00 nΩ·m
2
43.30 nΩ·m
99+
Electrical Conductivity
0.01 106/cm Ω
99+
0.21 106/cm Ω
8
Electron Affinity
50.00 kJ/mol
21
109.70 kJ/mol
7
Thermal Properties
Specific Heat
0.17 J/(kg K)
34
0.24 J/(kg K)
22
Molar Heat Capacity
27.70 J/mol·K
14
24.98 J/mol·K
99+
Thermal Conductivity
10.70 W/m·K
99+
150.00 W/m·K
9
Critical Temperature
Not Available
Not Available
Thermal Expansion
9.90 µm/(m·K)
40
8.20 µm/(m·K)
99+
Enthalpy
Enthalpy of Vaporization
230.00 kJ/mol
39
495.40 kJ/mol
12
Enthalpy of Fusion
11.05 kJ/mol
32
21.76 kJ/mol
10
Enthalpy of Atomization
301.00 kJ/mol
36
556.50 kJ/mol
12
Standard Molar Entropy
75.60 J/mol.K
7
31.50 J/mol.K
99+
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