Holmium

Holmium

Holmium (Ho) is a soft, malleable, silvery rare earth element belonging to the lanthanide series. It has a melting point of 1472 °C and is known for its exceptional magnetic properties and ability to absorb neutrons. Holmium is primarily extracted from monazite and bastnäsite ores, often in conjunction with other rare earth elements, and is separated using ion exchange and solvent extraction techniques.

Goodfellow's pure Holmium products are designed to meet the exacting needs of advanced research and industrial applications. Available in forms such as foil, powder, rod, and disk, holmium is valued for its exceptional magnetic properties and high neutron absorption capacity. This rare earth metal exhibits one of the highest magnetic moments of any naturally occurring element and becomes ferromagnetic at temperatures below 19 K. Holmium finds critical applications in nuclear technology, medical lasers, and glass manufacturing industries. It plays a vital role in holmium-doped YAG lasers used for precise medical procedures such as kidney stone removal and glaucoma treatment. In nuclear reactors, holmium is used in control rods, contributing to safety and efficiency. Goodfellow's holmium products support cutting-edge research in quantum computing, where single holmium atoms show potential for storing quantum bits. Their unique properties make them indispensable for scientists and engineers advancing materials science, particularly in applications requiring strong magnetic fields and specialized optical characteristics.



General Properties

PropertyValue
Atomic Number67
Density8.795 g/cm³
Melting Point1472 °C
Boiling Point2700 °C
Thermal Conductivity16.2 W/m·K
Electrical Resistivity79 nΩ·m
Crystal StructureHexagonal Close-Packed (HCP)

Mechanical Properties

PropertyValue
Tensile Strength~225 MPa (approximate)
Yield StrengthUnknown / Not well defined
Young’s Modulus64 GPa
HardnessBrinell ~400 (approximate)
Elongation at Break~15%
Poisson’s Ratio0.23

Chemical Properties

PropertyValue
Corrosion ResistanceModerate; forms oxide coating in air
ReactivityReacts slowly with oxygen and water
Oxidation States+3
Surface OxideForms Ho₂O₃ in air
IdentifierValue
SymbolHo
Atomic Number67
CAS Number7440-60-0
UN NumberNot Classified
EINECS Number231-169-0
IsotopeTypeNotes
Ho-165Stable100% natural abundance

Scientific Applications

Use CaseDescription
Quantum ComputingInvestigated for use in qubit systems due to unique magnetic properties
Medical ImagingUsed in paramagnetic contrast agents for MRI
Neutron AbsorptionValuable for nuclear research due to high neutron-absorbing cross-section
Laser DevelopmentUsed in doped laser crystals for solid-state lasers
Magneto-Optical DevicesEmployed in Faraday rotators and isolators

Industrial Applications

Use CaseDescription
Magnetic AlloysUsed in high-strength magnets with cobalt for temperature stability
Nuclear Control RodsApplied in nuclear reactors to regulate neutron flux
Glass ColoringAdds yellow or red tint to glass and ceramics
High-Temperature ApplicationsComponent in alloys for high-performance applications
Data StorageStudied for potential in high-density optical media
PurityMain UsesNotes
99% (2N) Glass coloring, nuclear shielding, alloy development Standard grade for bulk industrial applications; lower cost
99.9% (3N) Scientific research, magneto-optical devices, laser systems Preferred for research and high-performance technologies
Synonym
Ho
Ho metal
Ho element
Holmium metal
Holmium element
Holmium rare earth metal
Holmium rare earth element
Element 67