Elements
67

Ho

Holmium

Holmium (Ho) is a silvery coloured metal that has the atomic number 67 in the periodic table. It is a Lanthanide metal. It has the symbol Ho.

Holmium was discovered using spectroscopy by Marc Delafontaine and Jacques-Louis Soret in 1878. in 1879 during the extraction of the mineral Erbia a brown substance was obtained which was Holmium oxide. The name Holmium comes from the Greek word Holmia which is the greek for Stockholm. Holmium compounds tend to be brownish yellow in colour and Holmium has unusual magnetic properties. Due to this it is used in the production of magnets and also used as a colouring in cubic zirconia. It is a solid metal at room temperature with a melting point of 1461°c and a boiling point of 2720°c.

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FAQ's

What is the Melting Point for Holmium?

Holmium has a Melting Point of 1474°F, meaning at 1474°F it will turn to a liquid.

What is the Boiling Point for Holmium?

Holmium has a Boiling Point of 2700°F, meaning at 2700°F it will turn to a Gas.

What is the Electronegativity of Holmium?

Holmium's Electronegativty is 1.23. Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

What is the Heat of Vaporization of Holmium?

Holmium has a Heat of Vaporization of 241 kJ/mol.

Uses

It has very few practical applications; however, it has some unusual magnetic properties that offer some hope for future applications.

Sources

Occurs in gadolinite. Most often from monazite which is often 50% rare earth and typically 0.05% holmium.

67
Protons
67
Electrons
98
Neutrons

Ho

Element Symbol
Ho
Atomic Weight
164.93
Atomic Number
67
State
Solid
Melting Point
Unknown
1474
°C
Boiling Point
2700
Unknown
°C
Heat of Vaporization
241
Unknown
kJ/mol
Crystal Structure
Hexagonal
Thermoconductivity
0.162
Unknown
W/cmK
Shells
2,8,18,29,8,2
Group
Lanthanide
Period
6
Block
F Block
Orbitals
[Xe] 4f11 6s2
Coefficient of Thermal Expansion
9.8 10^-6 K^-1
Covalent Radius
1.58 Å
Density at 293K
8.80 g/cm³
Electrical Conductivity
0.0124 10^6/cm ohm
First Ionization Potential
6.0216 V
Second Ionization Potential
11.805 V
Third Ionization Potential
22.843 V
Ionic Radius
--
Oxydation States
3
Lattice Parameter
3.5774 Å
Lattice Parameter 2
--
Lattice Parameter 3
--
Pronounced

HOLE-mi-em

Discovered by

J.L. Soret

Discovery date

1878

Orbital configuration
2,8,18,29,8,2

Download the Periodic Table

Explore Other Lanthanides

151.964
63

Eu

Europium
140.116
58

Ce

Cerium
174.967
71

Lu

Lutetium
140.908
59

Pr

Praseodymium
162.5
66

Dy

Dysprosium
138.905
57

La

Lanthanum
150.36
62

Sm

Samarium
168.934
69

Tm

Thulium
144.24
60

Nd

Neodymium
145
61

Pm

Promethium
157.25
64

Gd

Gadolinium
173.045
70

Yb

Ytterbium
167.259
68

Er

Erbium
158.925
65

Tb

Terbium
The lanthanide series contains 15 metallic elements from number 57 (lanthanum) to 71 (lutetium). They are located in group 3 and in the f-block of period six in the periodic table.
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