Rubidium vs Indium
Periodic Table
Symbol
Rb
In
Group Number
1
17
13
5
Period Number
5
5
Block
s block
p block
Element Family
Alkali
Post-Transition
CAS Number
7440177
99+
7440746
17
Space Group Name
Im_ 3m
I4/mmm
Space Group Number
229.00
1
139.00
8
Facts
Interesting Facts
- Rubidium metal is 16th most common element found in the earth crust.
- Rubidium metal also found in minerals as well as seawater.
- Luster of Indium is bright in nature.
- Reich and richer were looking for thallium in zinc metal and they discovered Indium metal.
Sources
Obtained from Lithium Production.
Mining, Ores of metals
History
Who Discovered
Robert Bunsen and Gustav Kirchhoff
Ferdinand Reich and Hieronymous Theodor Richter
Discovery
In 1861
In 1863
Abundance
Abundance In Universe
1 * 10-6 %
16
3 * 10-8 %
28
Abundance In Sun
~0.000003 %
17
~0.0000004 %
23
Abundance In Meteorites
0.00 %
19
0.00 %
99+
Abundance In Earth's Crust
0.01 %
18
0.00 %
99+
Abundance In Oceans
0.00 %
7
0.00 %
99+
Abundance In Humans
0.00 %
7
Not Available
Uses
Uses & Benefits
- Rubidium's main application is in the glass manufacturing.
- Rubidium can very easily get ionized and hence it is used for ion engines, but it is still less efficient than that of Caesium.
- It is used to produce indium tin oxide (ITO), it is used in manufacturing touch screens, flat screen TVs and solar panels.
- Its nitride, phosphide and antimonide are used in transistors and microchips.
Industrial Uses
NA
Aerospace Industry, Automobile Industry
Medical Uses
NA
Medical Research
Other Uses
Alloys, Research Purposes
Alloys, In Nuclear Reactors
Biological Properties
Toxicity
Non Toxic
Non Toxic
Present in Human Body
Yes
Yes
In Blood
2.49 Blood/mg dm-3
7
Not Available
In Bone
5.00 p.p.m.
13
Not Available
Physical Properties
Melting Point
38.89 °C
99+
156.61 °C
99+
Boiling Point
688.00 °C
99+
2,000.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Grayish White
Silvery Gray
Luster
NA
Lustrous
Hardness
Mohs Hardness
0.30
24
1.20
20
Brinell Hardness
0.22 MPa
99+
8.80 MPa
99+
Speed of Sound
1,300.00 m/s
99+
1,215.00 m/s
99+
Optical Properties
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
Rb
In
Isotopes
Known Isotopes
29
10
35
4
Electronegativity
Pauling Electronegativity
0.82
99+
1.78
16
Sanderson Electronegativity
0.31
32
2.14
8
Allred Rochow Electronegativity
0.89
40
1.49
13
Mulliken-Jaffe Electronegativity
0.69
24
1.76
10
Allen Electronegativity
0.71
99+
1.66
18
Electropositivity
Pauling Electropositivity
3.18
3
2.22
38
Ionization Energies
1st Energy Level
403.00 kJ/mol
99+
558.30 kJ/mol
99+
2nd Energy Level
2,633.00 kJ/mol
6
1,820.70 kJ/mol
18
3rd Energy Level
3,860.00 kJ/mol
11
2,704.00 kJ/mol
39
4th Energy Level
5,080.00 kJ/mol
18
5,210.00 kJ/mol
17
5th Energy Level
6,850.00 kJ/mol
19
Not Available
6th Energy Level
8,140.00 kJ/mol
20
Not Available
7th Energy level
9,570.00 kJ/mol
20
Not Available
8th Energy Level
13,120.00 kJ/mol
17
Not Available
9th Energy Level
14,500.00 kJ/mol
18
Not Available
10th Energy Level
26,740.00 kJ/mol
6
Not Available
Electrochemical Equivalent
3.19 g/amp-hr
14
1.43 g/amp-hr
99+
Electron Work Function
2.16 eV
99+
4.12 eV
24
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Radioactivity
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic Properties
Atomic Number
37
99+
49
99+
Electron Configuration
[Kr] 5s1
[Kr] 4d10 5s2 5p1
Crystal Structure
Body Centered Cubic (BCC)
Tetragonal (TETR)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
TETR-Crystal-Structure-of-Indium.jpg#100
Atom
Number of Protons
37
99+
49
99+
Number of Neutrons
48
99+
66
99+
Number of Electrons
37
99+
49
99+
Radius of an Atom
Atomic Radius
248.00 pm
2
167.00 pm
24
Covalent Radius
220.00 pm
4
142.00 pm
99+
Van der Waals Radius
303.00 pm
3
193.00 pm
31
Atomic Weight
85.47 amu
99+
114.82 amu
99+
Atomic Volume
55.90 cm3/mol
2
15.70 cm3/mol
33
Adjacent Atomic Numbers
Valence Electron Potential
9.47 (-eV)
99+
54.00 (-eV)
25
Lattice Constant
558.50 pm
10
325.23 pm
99+
Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
1.53 g/cm3
99+
7.31 g/cm3
99+
Density When Liquid (at m.p.)
1.46 g/cm3
99+
7.02 g/cm3
33
Tensile Strength
Not Available
2.50 MPa
21
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
Not Available
0.01 (Pa)
11
Elasticity properties
Bulk Modulus
2.50 GPa
99+
Not Available
Young's Modulus
2.40 GPa
99+
11.00 GPa
99+
Poisson Ratio
Not Available
Not Available
Other Mechanical Properties
Ductile
Ductile, Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
1.53
99+
7.31
99+
Magnetic Ordering
Paramagnetic
Diamagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
128.00 nΩ·m
26
83.70 nΩ·m
34
Electrical Conductivity
0.08 106/cm Ω
24
0.12 106/cm Ω
17
Electron Affinity
46.90 kJ/mol
24
28.90 kJ/mol
31
Thermal Properties
Specific Heat
0.36 J/(kg K)
17
0.23 J/(kg K)
27
Molar Heat Capacity
31.06 J/mol·K
5
26.74 J/mol·K
25
Thermal Conductivity
58.20 W/m·K
26
81.80 W/m·K
21
Critical Temperature
2,093.00 K
4
Not Available
Thermal Expansion
90.00 µm/(m·K)
2
32.10 µm/(m·K)
9
Enthalpy
Enthalpy of Vaporization
69.20 kJ/mol
99+
226.40 kJ/mol
40
Enthalpy of Fusion
2.19 kJ/mol
99+
3.28 kJ/mol
99+
Enthalpy of Atomization
82.00 kJ/mol
99+
242.70 kJ/mol
99+
Standard Molar Entropy
76.80 J/mol.K
5
57.80 J/mol.K
22
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