Holmium

Hafnium

Holmium Hafnium Comparison

Holmium

Hafnium

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Periodic Table

Symbol

Group Number

Period Number

Block

Element Family

CAS Number

Space Group Name

Space Group Number

Facts

Interesting Facts

Sources

Who Discovered

Discovery

Abundance In Universe

Abundance In Sun

Abundance In Meteorites

Abundance In Earth's Crust

Abundance In Oceans

Abundance In Humans

Uses

Uses & Benefits

Industrial Uses

Medical Uses

Other Uses

Toxicity

Present in Human Body

In Blood

In Bone

Physical

Melting Point

Boiling Point

Physical State

Color

Luster

Mohs Hardness

Brinell Hardness

Vickers Hardness

Speed of Sound

Refractive Index

Reflectivity

Allotropes

α Allotropes

β Allotropes

γ Allotropes

Chemical

Chemical Formula

Known Isotopes

Pauling Electronegativity

Sanderson Electronegativity

Allred Rochow Electronegativity

Mulliken-Jaffe Electronegativity

Allen Electronegativity

Pauling Electropositivity

1st Energy Level

2nd Energy Level

3rd Energy Level

4th Energy Level

5th Energy Level

6th Energy Level

7th Energy level

8th Energy Level

9th Energy Level

10th Energy Level

11th Energy Level

12th Energy Level

13th Energy Level

14th Energy Level

15th Energy Level

16th Energy Level

17th Energy Level

18th Energy Level

19th Energy Level

20th Energy Level

21st Energy Level

22nd Energy Level

23rd Energy Level

24th Energy Level

25th Energy Level

26th Energy Level

27th Energy Level

28th Energy Level

29th Energy Level

30th Energy Level

Electrochemical Equivalent

Electron Work Function

Other Chemical Properties

Atomic

Atomic Number

Electron Configuration

Crystal Structure

Crystal Lattice

Number of Protons

Number of Neutrons

Number of Electrons

Atomic Radius

Covalent Radius

Van der Waals Radius

Atomic Weight

Atomic Volume

Previous Element

Next Element

Valence Electron Potential

Lattice Constant

Lattice Angles

Lattice C/A Ratio

Mechanical

Density At Room Temperature

Density When Liquid (at m.p.)

Tensile Strength

Viscosity

Vapor Pressure at 1000 K

Vapor Pressure at 2000 K

Shear Modulus

Bulk Modulus

Young's Modulus

Poisson Ratio

Other Mechanical Properties

Magnetic

Specific Gravity

Magnetic Ordering

Permeability

Susceptibility

Electrical Property

Resistivity

Electrical Conductivity

Electron Affinity

Thermal

Specific Heat

Molar Heat Capacity

Thermal Conductivity

Critical Temperature

Thermal Expansion

Enthalpy of Vaporization

Enthalpy of Fusion

Enthalpy of Atomization

Standard Molar Entropy

f block

Lanthanide

7440600

P63/mmc

194.00

Holmium metal is very soft and malleable.
Holmium metal is well known for its corrosion resistivity.

Found in Minerals, Mining, Ores of Minerals

Marc Delafontaine

In 1878

0.00 %

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.

Alloys, Nuclear Research

Low Toxic

✔✘

0.00 Blood/mg dm-3

0.00 p.p.m.

1,461.00 °C

2,600.00 °C

Solid

Silvery White

Metallic

4.00

746.00 MPa

481.00 MPa

2,760.00 m/s

1.67

67.00 %

✔✘

1.23

1.10

1.23

2.77

581.00 kJ/mol

1,140.00 kJ/mol

2,204.00 kJ/mol

4,100.00 kJ/mol

5,810.00 kJ/mol

6,500.00 kJ/mol

5,810.00 kJ/mol

58,100.00 kJ/mol

581.00 kJ/mol

5,810.00 kJ/mol

581.00 kJ/mol

5,810.00 kJ/mol

581.00 kJ/mol

584.70 kJ/mol

581.00 kJ/mol

584.70 kJ/mol

581.00 kJ/mol

2.02 g/amp-hr

4.90 eV

Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility

[Xe] 4f¹¹ 6s²

Hexagonal Close Packed (HCP)

HCP-Crystal-Structure-of-Holmium.jpg#100

176.00 pm

192.00 pm

216.00 pm

164.93 amu

18.70 cm3/mol

47.90 (-eV)

357.73 pm

π/2, π/2, 2 π/3

1.57

8.79 g/cm³

8.34 g/cm3

270.00 MPa

0.00

0.00 (Pa)

26.30 GPa

40.20 GPa

64.80 GPa

0.23

Ductile, Malleable, Sectile

8.80

Paramagnetic

0.00 H/m

0.00

Conductor

814.00 nΩ·m

0.01 10⁶/cm Ω

50.00 kJ/mol

0.16 J/(kg K)

27.15 J/mol·K

16.20 W/m·K

1,747.00 K

11.20 µm/(m·K)

241.00 kJ/mol

11.76 kJ/mol

301.00 kJ/mol

75.30 J/mol.K

d block

Transition Metal

7440586

P63/mmc

194.00

Hafnium metal is highly reactive, hence not found free in nature.
Hafnium metal as predicated after Mendeleev finished his periodic table.

By-product Zirconium Refining

Dirk Coster and George de Hevesy

In 1922

0.00 %

It has an ability to absorb neutrons and hence it is used to make control rods in nuclear submarines. And this metal is also used in Plasma welding torches.
It alloys with iron, titanium and niobium are very useful.

Ammunition Industry

Alloys, In Nuclear Reactors, Nuclear Research, Research Purposes

Toxic

✔✘

0.00 Blood/mg dm-3

0.00 p.p.m.

2,150.00 °C

5,400.00 °C

Solid

Gray

Metallic

5.50