1 Periodic Table
1.1 Symbol
1.2 Group Number
1.3 Period Number
1.3 Block
1.4 Element Family
Lanthanide
Alkaline Earth
1.2 CAS Number
74406007440246
7429905
54386242
1.6 Space Group Name
1.7 Space Group Number
2 Facts
2.1 Interesting Facts
- Holmium metal is very soft and malleable.
- Holmium metal is well known for its corrosion resistivity.
- Strontium element is softer than Calcium.
- Silvery Strontium turns yellow, if exposed to air.
2.2 Sources
Found in Minerals, Mining, Ores of Minerals
Found in Minerals, Mining, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Marc Delafontaine
William Cruickshank
2.3.2 Discovery
2.4 Abundance
2.4.1 Abundance In Universe
5 * 10-8 %4 * 10-6 %
5E-09
0.11
2.11.2 Abundance In Sun
~-9999 %~0.000005 %
1E-08
0.1
3.6.1 Abundance In Meteorites
4.3.2 Abundance In Earth's Crust
4.4.6 Abundance In Oceans
4.5.2 Abundance In Humans
5 Uses
5.1 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.
- Strontium metal is used to producing ferrite magnets as well as refining zinc.
-
By-product of nuclear reactors called Strontium-90 is a radioactive isotope; it is absorbed by tissues and destroys bone marrow and cancer growth.
5.1.1 Industrial Uses
NA
Ammunition Industry, Chemical Industry
5.1.2 Medical Uses
5.1.3 Other Uses
Alloys, Nuclear Research
Alloys
5.2 Biological Properties
5.2.1 Toxicity
5.2.2 Present in Human Body
5.2.3 In Blood
NA0.03 Blood/mg dm-3
0
1970
6.2.4 In Bone
9 Physical
9.1 Melting Point
1,461.00 °C769.00 °C
27
3410
10.3 Boiling Point
2,600.00 °C1,384.00 °C
147
5660
11.4 Appearance
11.4.1 Physical State
11.4.2 Color
Silvery White
Silvery White
11.4.3 Luster
11.5 Hardness
11.5.1 Mohs Hardness
1.3.3 Brinell Hardness
1.7.1 Vickers Hardness
2.3 Speed of Sound
2.8 Optical Properties
2.8.1 Refractive Index
2.11.3 Reflectivity
2.12 Allotropes
2.12.1 α Allotropes
Not Available
Not Available
2.12.2 β Allotropes
Not Available
Not Available
2.12.3 γ Allotropes
Not Available
Not Available
3 Chemical
3.1 Chemical Formula
3.2 Isotopes
3.2.1 Known Isotopes
4.5 Electronegativity
4.5.1 Pauling Electronegativity
5.3.2 Sanderson Electronegativity
5.5.5 Allred Rochow Electronegativity
5.5.11 Mulliken-Jaffe Electronegativity
5.5.16 Allen Electronegativity
5.6 Electropositivity
5.6.1 Pauling Electropositivity
5.7 Ionization Energies
5.7.1 1st Energy Level
581.00 kJ/mol549.50 kJ/mol
375.7
26130
5.7.4 2nd Energy Level
1,140.00 kJ/mol1,064.20 kJ/mol
710.2162
28750
6.2.4 3rd Energy Level
2,204.00 kJ/mol4,138.00 kJ/mol
1600
34230
1.2.1 4th Energy Level
4,100.00 kJ/mol5,500.00 kJ/mol
2780
37066
1.3.5 5th Energy Level
NA6,910.00 kJ/mol
4305.2
97510
1.4.2 6th Energy Level
NA8,760.00 kJ/mol
5715.8
105800
2.1.2 7th Energy level
NA10,230.00 kJ/mol
7226.8
114300
2.2.2 8th Energy Level
NA11,800.00 kJ/mol
8857.4
125300
2.4.2 9th Energy Level
NA15,600.00 kJ/mol
14110
134700
3.3.3 10th Energy Level
NA17,100.00 kJ/mol
17100
144300
3.5.1 11th Energy Level
NA31,270.00 kJ/mol
19900
169988
4.1.2 12th Energy Level
4.1.6 13th Energy Level
4.6.5 14th Energy Level
4.6.10 15th Energy Level
4.6.16 16th Energy Level
5.2.4 17th Energy Level
5.2.10 18th Energy Level
6.2.1 19th Energy Level
6.3.4 20th Energy Level
6.5.1 21st Energy Level
6.6.2 22nd Energy Level
6.6.5 23rd Energy Level
7.4.2 24th Energy Level
7.6.1 25th Energy Level
8.1.2 26th Energy Level
8.1.4 27th Energy Level
8.3.1 28th Energy Level
8.6.3 29th Energy Level
8.6.6 30th Energy Level
8.9 Electrochemical Equivalent
2.02 g/amp-hr1.64 g/amp-hr
0.16812
8.3209
8.12 Electron Work Function
8.15 Other Chemical Properties
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Radioactivity, Solubility
9 Atomic
9.1 Atomic Number
11.3 Electron Configuration
11.4 Crystal Structure
Hexagonal Close Packed (HCP)
Face Centered Cubic (FCC)
11.4.1 Crystal Lattice
11.5 Atom
11.5.1 Number of Protons
11.6.5 Number of Neutrons
11.8.2 Number of Electrons
11.13 Radius of an Atom
11.13.1 Atomic Radius
176.00 pm215.00 pm
112
265
11.16.1 Covalent Radius
192.00 pm195.00 pm
96
260
11.16.3 Van der Waals Radius
216.00 pm249.00 pm
139
348
12.2 Atomic Weight
164.93 amu87.62 amu
6.94
294
12.9 Atomic Volume
18.70 cm3/mol33.70 cm3/mol
1.39
71.07
13.2 Adjacent Atomic Numbers
13.2.1 Previous Element
13.2.2 Next Element
13.3 Valence Electron Potential
47.90 (-eV)25.70 (-eV)
8
392.42
13.4 Lattice Constant
357.73 pm608.49 pm
228.58
891.25
13.6 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
13.7 Lattice C/A Ratio
14 Mechanical
14.1 Density
14.1.1 Density At Room Temperature
8.79 g/cm32.64 g/cm3
0.534
40.7
15.1.2 Density When Liquid (at m.p.)
8.34 g/cm32.38 g/cm3
0.512
20
15.4 Tensile Strength
15.6 Viscosity
15.8 Vapor Pressure
15.8.1 Vapor Pressure at 1000 K
0.00 (Pa)121.00 (Pa)
2.47E-11
121
15.11.1 Vapor Pressure at 2000 K
15.12 Elasticity properties
15.12.1 Shear Modulus
26.30 GPa6.03 GPa
1.3
222
15.13.4 Bulk Modulus
16.2.2 Young's Modulus
64.80 GPa15.70 GPa
1.7
528
17.2 Poisson Ratio
18.2 Other Mechanical Properties
Ductile, Malleable, Sectile
NA
19 Magnetic
19.1 Magnetic Characteristics
19.1.1 Specific Gravity
19.2.3 Magnetic Ordering
Paramagnetic
Paramagnetic
19.2.4 Permeability
19.5.1 Susceptibility
19.6 Electrical Properties
19.6.1 Electrical Property
19.6.2 Resistivity
814.00 nΩ·m132.00 nΩ·m
0.18
961
19.8.3 Electrical Conductivity
0.01 106/cm Ω0.08 106/cm Ω
0.00666
0.63
19.9.4 Electron Affinity
50.00 kJ/mol5.03 kJ/mol
0
222.8
20 Thermal
20.1 Specific Heat
0.16 J/(kg K)0.30 J/(kg K)
0.11
3.6
1.4 Molar Heat Capacity
27.15 J/mol·K26.40 J/mol·K
16.443
62.7
1.7 Thermal Conductivity
16.20 W/m·K35.40 W/m·K
6.3
429
2.5 Critical Temperature
3.2 Thermal Expansion
11.20 µm/(m·K)22.50 µm/(m·K)
4.5
97
4.2 Enthalpy
4.2.1 Enthalpy of Vaporization
241.00 kJ/mol150.00 kJ/mol
7.32
799.1
4.9.3 Enthalpy of Fusion
11.76 kJ/mol9.16 kJ/mol
2.1
35.23
5.5.2 Enthalpy of Atomization
301.00 kJ/mol163.20 kJ/mol
61.5
837
6.2 Standard Molar Entropy
75.30 J/mol.K55.00 J/mol.K
9.5
198.1