1 Periodic Table
1.1 Symbol
1.2 Group Number
1.9 Period Number
1.12 Block
1.13 Element Family
1.14 CAS Number
74406007439998
7429905
54386242
2.5 Space Group Name
2.6 Space Group Number
3 Facts
3.1 Interesting Facts
- Holmium metal is very soft and malleable.
- Holmium metal is well known for its corrosion resistivity.
Not Available
3.3 Sources
Found in Minerals, Mining, Ores of Minerals
Made by Bombarding Uranium with Neutrons, Ores of metals
3.4 History
3.4.1 Who Discovered
Marc Delafontaine
Edwin McMillan and Philip H. Abelson
3.4.2 Discovery
3.5 Abundance
3.5.1 Abundance In Universe
3.5.4 Abundance In Sun
~-9999 %~-9999 %
1E-08
0.1
3.5.8 Abundance In Meteorites
4.2.1 Abundance In Earth's Crust
4.3.2 Abundance In Oceans
5.1.3 Abundance In Humans
6 Uses
6.1 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.
- Currently known uses of Neptunium metal are limited to research purpose only.
-
Neptunium’s isotope neptunium-237 is used as a neutron detectors.
6.1.1 Industrial Uses
6.1.2 Medical Uses
6.1.3 Other Uses
Alloys, Nuclear Research
Alloys, Nuclear Research, Research Purposes
6.2 Biological Properties
6.2.1 Toxicity
6.2.2 Present in Human Body
6.2.3 In Blood
NA0.00 Blood/mg dm-3
0
1970
6.4.3 In Bone
8 Physical
8.1 Melting Point
1,461.00 °C640.00 °C
27
3410
8.5 Boiling Point
2,600.00 °C3,902.00 °C
147
5660
9.5 Appearance
9.5.1 Physical State
9.5.2 Color
9.5.3 Luster
9.6 Hardness
9.6.1 Mohs Hardness
9.7.3 Brinell Hardness
10.2.2 Vickers Hardness
10.5 Speed of Sound
10.9 Optical Properties
10.9.1 Refractive Index
10.9.4 Reflectivity
10.10 Allotropes
10.10.1 α Allotropes
Not Available
Not Available
10.11.1 β Allotropes
Not Available
Not Available
10.11.2 γ Allotropes
Not Available
Not Available
11 Chemical
11.1 Chemical Formula
11.2 Isotopes
11.2.2 Known Isotopes
12.5 Electronegativity
12.5.1 Pauling Electronegativity
12.5.4 Sanderson Electronegativity
12.6.4 Allred Rochow Electronegativity
12.7.3 Mulliken-Jaffe Electronegativity
12.8.3 Allen Electronegativity
13.3 Electropositivity
13.3.1 Pauling Electropositivity
13.5 Ionization Energies
13.5.1 1st Energy Level
581.00 kJ/mol604.50 kJ/mol
375.7
26130
13.5.5 2nd Energy Level
1,140.00 kJ/mol1,128.00 kJ/mol
710.2162
28750
13.6.4 3rd Energy Level
2,204.00 kJ/mol1,997.00 kJ/mol
1600
34230
13.6.8 4th Energy Level
4,100.00 kJ/mol3,242.00 kJ/mol
2780
37066
13.6.12 5th Energy Level
13.6.16 6th Energy Level
13.6.17 7th Energy level
14.1.2 8th Energy Level
14.2.2 9th Energy Level
14.2.4 10th Energy Level
14.3.3 11th Energy Level
14.4.1 12th Energy Level
14.5.1 13th Energy Level
14.5.6 14th Energy Level
14.6.3 15th Energy Level
14.6.7 16th Energy Level
14.6.10 17th Energy Level
14.6.14 18th Energy Level
14.6.17 19th Energy Level
14.7.3 20th Energy Level
14.7.6 21st Energy Level
14.7.9 22nd Energy Level
14.7.11 23rd Energy Level
14.7.14 24th Energy Level
14.7.17 25th Energy Level
14.7.20 26th Energy Level
14.7.24 27th Energy Level
14.8.1 28th Energy Level
14.8.3 29th Energy Level
14.9.1 30th Energy Level
14.11 Electrochemical Equivalent
2.02 g/amp-hr1.77 g/amp-hr
0.16812
8.3209
15.3 Electron Work Function
16.2 Other Chemical Properties
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Radioactivity, Solubility
17 Atomic
17.1 Atomic Number
17.5 Electron Configuration
[Xe] 4f11 6s2
[Rn] 5f4 6d1 7s2
17.6 Crystal Structure
Hexagonal Close Packed (HCP)
Orthorhombic (ORTH)
17.6.1 Crystal Lattice
17.7 Atom
17.7.1 Number of Protons
17.7.4 Number of Neutrons
17.8.2 Number of Electrons
17.9 Radius of an Atom
17.9.1 Atomic Radius
176.00 pm155.00 pm
112
265
17.11.1 Covalent Radius
192.00 pm190.00 pm
96
260
17.11.3 Van der Waals Radius
216.00 pm221.00 pm
139
348
17.13 Atomic Weight
164.93 amu237.00 amu
6.94
294
17.17 Atomic Volume
18.70 cm3/mol11.62 cm3/mol
1.39
71.07
17.20 Adjacent Atomic Numbers
17.20.1 Previous Element
17.20.2 Next Element
17.21 Valence Electron Potential
47.90 (-eV)96.00 (-eV)
8
392.42
17.26 Lattice Constant
357.73 pm666.30 pm
228.58
891.25
18.3 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
18.4 Lattice C/A Ratio
19 Mechanical
19.1 Density
19.1.1 Density At Room Temperature
8.79 g/cm319.38 g/cm3
0.534
40.7
20.1.2 Density When Liquid (at m.p.)
20.4 Tensile Strength
20.7 Viscosity
20.9 Vapor Pressure
20.9.1 Vapor Pressure at 1000 K
20.10.2 Vapor Pressure at 2000 K
20.12 Elasticity properties
20.12.1 Shear Modulus
20.13.2 Bulk Modulus
20.13.4 Young's Modulus
20.14 Poisson Ratio
20.16 Other Mechanical Properties
Ductile, Malleable, Sectile
Ductile
21 Magnetic
21.1 Magnetic Characteristics
21.1.1 Specific Gravity
22.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
22.1.3 Permeability
22.2.3 Susceptibility
23.2 Electrical Properties
23.2.1 Electrical Property
23.2.2 Resistivity
814.00 nΩ·m1.22 nΩ·m
0.18
961
23.3.3 Electrical Conductivity
0.01 106/cm Ω0.01 106/cm Ω
0.00666
0.63
23.4.3 Electron Affinity
24 Thermal
24.1 Specific Heat
0.16 J/(kg K)0.12 J/(kg K)
0.11
3.6
25.2 Molar Heat Capacity
27.15 J/mol·K29.46 J/mol·K
16.443
62.7
25.4 Thermal Conductivity
16.20 W/m·K6.30 W/m·K
6.3
429
26.3 Critical Temperature
26.6 Thermal Expansion
26.9 Enthalpy
26.9.1 Enthalpy of Vaporization
241.00 kJ/molNA
7.32
799.1
26.11.2 Enthalpy of Fusion
11.76 kJ/mol3.20 kJ/mol
2.1
35.23
26.12.2 Enthalpy of Atomization
26.14 Standard Molar Entropy
75.30 J/mol.KNA
9.5
198.1