Ho
metal· JVASP-14624· Ho
Holmium (Ho) is a rare-earth lanthanide metal prized for its exceptionally strong magnetic properties and high neutron absorption cross-section. It is used primarily in specialized applications requiring magnetic intensity or nuclear control, including permanent magnets for high-field applications, nuclear reactor control rods, and research-grade electromagnets. Engineers select holmium over common ferromagnets when extreme magnetic field strength or precise neutron moderation is critical, though its scarcity and cost limit adoption to niche, high-value applications.
rare-earth permanent magnetsnuclear reactor control rodshigh-field research magnetsmagnetic resonance equipmentspecialized alloy additions
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 41.47 | GPa | — | ||
Poisson's Ratio(ν) | 0.3700 | - | — | ||
Shear Modulus(G) | -4.580 | GPa | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 9.050 | kg/m³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Seebeck Coefficient(S) | -2.657 | µV/K | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | 0.00860 | eV/atom | — |
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
Export Control
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.