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Gadolinium vs Gold

Gadolinium
Gold
Gold vs Gadolinium


Periodic Table
Symbol
Gd  
Au  
Group Number
0  
18
11  
7
Period Number
6  
6  
Block
f block  
d block  
Element Family
Lanthanide  
Transition Metal  
CAS Number
7440542  
33
7440575  
31
Space Group Name
P63/mmc  
Fm_ 3m  
Space Group Number
194.00  
5
225.00  
2
Facts
Interesting Facts
  • Gadolinium is not found free in nature, hence it is not a native metal.
  • Gadolinium metal found in minerals like Monazite and Bastnaesite.
  
  • It is found in copper ores and from the crust of the earth.
  • It is the most malleable and ductile metal.
  • Gold alloys are used in Dentistry as fillings, crowning, clips, etc. It is also used as an artificial limb joints.
  
Sources
Found in Minerals, Mining  
Earth's crust, Mining, Ores of metals  
History
  
  
Who Discovered
Jean Charles Galissard de Marignac  
Unknown  
Discovery
In 1880  
Before 6000 BCE  
Abundance
  
  
Abundance In Universe
2 * 10-7 %  
22
6 * 10-8 %  
26
Abundance In Sun
~0.0000002 %  
25
~0.0000001 %  
26
Abundance In Meteorites
0.00 %  
34
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
30
0.00 %  
99+
Abundance In Oceans
0.00 %  
38
0.00 %  
21
Abundance In Humans
Not Available  
0.00 %  
18
Uses
Uses & Benefits
  • Its alloys are also used in making Magnets, electronic components and Data storage devices.
  • Compound of Gadolinium metal are used in magnetic resonance imaging (MRI).
  
  • Gold metal is mainly used for Jewelry, bullion, coinage, etc.
  • It is used in the art, decoration, ornaments, etc. It is also used for electroplating process.
  
Industrial Uses
Aerospace Industry, Electrical Industry, Electronic Industry  
Chemical Industry, Clothing Industry, Electrical Industry, Electronic Industry  
Medical Uses
NA  
Dentistry, Pharmaceutical Industry  
Other Uses
Alloys  
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Biological Properties
  
  
Toxicity
Non Toxic  
Non Toxic  
Present in Human Body
No  
Yes  
In Blood
Not Available  
0.00 Blood/mg dm-3  
35
In Bone
Not Available  
0.02 p.p.m.  
30
Physical Properties
Melting Point
1,311.00 °C  
35
1,064.43 °C  
99+
Boiling Point
3,233.00 °C  
25
2,807.00 °C  
36
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Gold  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
Not Available  
2.50  
14
Brinell Hardness
Not Available  
194.00 MPa  
99+
Vickers Hardness
510.00 MPa  
22
216.00 MPa  
31
Speed of Sound
2,680.00 m/s  
34
2,030.00 m/s  
99+
Optical Properties
  
  
Reflectivity
Not Available  
95.00 %  
2
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
Gd  
Au  
Isotopes
  
  
Known Isotopes
26  
13
36  
3
Electronegativity
  
  
Pauling Electronegativity
1.20  
39
2.54  
1
Allred Rochow Electronegativity
1.11  
29
1.42  
18
Mulliken-Jaffe Electronegativity
Not Available  
1.87  
7
Allen Electronegativity
Not Available  
1.92  
5
Electropositivity
  
  
Pauling Electropositivity
2.80  
15
1.46  
99+
Ionization Energies
  
  
1st Energy Level
593.40 kJ/mol  
99+
890.10 kJ/mol  
8
2nd Energy Level
1,170.00 kJ/mol  
99+
1,980.00 kJ/mol  
12
3rd Energy Level
1,990.00 kJ/mol  
99+
Not Available  
4th Energy Level
4,250.00 kJ/mol  
30
Not Available  
Electrochemical Equivalent
1.96 g/amp-hr  
32
2.45 g/amp-hr  
21
Electron Work Function
3.10 eV  
35
5.10 eV  
4
Other Chemical Properties
Corrosion, Flammable, Ionization, Radioactive Isotopes  
Chemical Stability, Ionization, Solubility  
Atomic Properties
Atomic Number
64  
99+
79  
37
Electron Configuration
[Xe] 4f7 5d1 6s2  
[Xe] 4f14 5d10 6s1  
Crystal Structure
Hexagonal Close Packed (HCP)  
Face Centered Cubic (FCC)  
Crystal Lattice
HCP-Crystal-Structure-of-Gadolinium.jpg#100  
FCC-Crystal-Structure-of-Gold.jpg#100  
Atom
  
  
Number of Protons
64  
99+
79  
37
Number of Neutrons
93  
37
118  
23
Number of Electrons
64  
99+
79  
37
Radius of an Atom
  
  
Atomic Radius
180.00 pm  
14
151.00 pm  
32
Covalent Radius
196.00 pm  
14
144.00 pm  
40
Van der Waals Radius
237.00 pm  
15
166.00 pm  
39
Atomic Weight
47.87 amu  
99+
196.97 amu  
33
Atomic Volume
19.90 cm3/mol  
20
10.20 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Europium
  
Platinum
  
Next Element
Terbium
  
Mercury
  
Valence Electron Potential
46.10 (-eV)  
34
43.40 (-eV)  
99+
Lattice Constant
363.60 pm  
32
407.82 pm  
21
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.59  
9
1.61  
4
Mechanical Properties
Density
  
  
Density At Room Temperature
7.90 g/cm3  
99+
19.30 g/cm3  
15
Density When Liquid (at m.p.)
7.40 g/cm3  
31
17.31 g/cm3  
6
Tensile Strength
Not Available  
120.00 MPa  
15
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
30
0.00 (Pa)  
23
Vapor Pressure at 2000 K
7.39 (Pa)  
9
67.00 (Pa)  
4
Elasticity properties
  
  
Shear Modulus
21.80 GPa  
33
27.00 GPa  
27
Bulk Modulus
37.90 GPa  
34
180.00 GPa  
9
Young's Modulus
54.80 GPa  
35
79.00 GPa  
24
Poisson Ratio
0.26  
23
0.40  
4
Other Mechanical Properties
Ductile, Malleable  
Ductile, Malleable  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
7.90  
40
19.32  
8
Magnetic Ordering
Ferromagnetic  
Diamagnetic  
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
1.31 nΩ·m  
99+
2.20 nΩ·m  
99+
Electrical Conductivity
0.01 106/cm Ω  
99+
0.45 106/cm Ω  
3
Electron Affinity
50.00 kJ/mol  
21
222.80 kJ/mol  
1
Thermal Properties
Specific Heat
0.23 J/(kg K)  
27
0.13 J/(kg K)  
39
Molar Heat Capacity
37.03 J/mol·K  
2
25.42 J/mol·K  
40
Thermal Conductivity
10.60 W/m·K  
99+
318.00 W/m·K  
3
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
9.40 µm/(m·K)  
99+
14.20 µm/(m·K)  
26
Enthalpy
  
  
Enthalpy of Vaporization
359.40 kJ/mol  
21
324.40 kJ/mol  
27
Enthalpy of Fusion
10.05 kJ/mol  
36
12.55 kJ/mol  
27
Enthalpy of Atomization
352.00 kJ/mol  
27
364.00 kJ/mol  
25
Standard Molar Entropy
68.10 J/mol.K  
16
47.40 J/mol.K  
32
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