Holmium
Holmium General
Name:Holmium | Symbol:Ho |
Type:Rare Earth, Lanthanides | Atomic weight:164.9304 |
Density @ 293 K: 8.80 g/cm3 | Atomic volume:18.7 cm3/mol |
Discovered:
1879 |
Holmium States
State (s, l, g):solid | |
Melting point:1743.2 K | Boiling point:2873 K |
Holmium Energies
Specific heat capacity:0.16 J/gK | Heat of atomization:301 kJ/mole atoms |
Heat of fusion:12.20 kJ/mol | Heat of vaporization :241.0 kJ/mol |
1st ionization energy:241.0 kJ/mol | 2nd ionization energy:1139 kJ/mole |
3rd ionization energy:2204 kJ/mole | Electron affinity:50 kJ/mole |
Holmium Oxidation & Electrons
Shells:2,8,18,29,8,2 | Electron configuration:[Xe] 4f11 6s2 |
Minimum oxidation number:0 | Maximum oxidation number:3 |
Min. common oxidation no.:0 | Max. common oxidation no.:3 |
Electronegativity (Pauling Scale):1.23 | Polarizability volume:23.6 Å3 |
Holmium Appearance & Characteristics
Structure:hcp: hexagonal close pkd | Color:silvery-white |
Hardness:mohs | |
Harmful effects:
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Characteristics:
Uses: alloys |
Holmium Reactions
Reaction with air:vigorous, => Ho2O3 | Reaction with 6 M HCl:mild, => H2, HoCl3 |
Reaction with 15 M HNO3:mild, => Ho(NO3)3 | Reaction with 6 M NaOH: |
Holmium Compounds
Oxide(s):Ho2O3 | Chloride(s):HoCl3 |
Hydride(s):HoH2 HoH3 |
Holmium Radius
Atomic radius:176 pm | Ionic radius (1+ ion):pm |
Ionic radius (2+ ion):pm | Ionic radius (3+ ion):104.1 pm |
Ionic radius (2- ion):pm | Ionic radius (1- ion):pm |
Holmium Conductivity
Thermal conductivity:16.2 J/m-sec-deg | Electrical conductivity:11.4 1/mohm-cm |
Holmium Abundance & Isotopes
Abundance earth's crust:0.1 log | |
Abundance solar system:-1.051 log | |
Cost, pure:$1722 per 100g | |
Cost, bulk:$/100g | |
Source:
Monazite(phosphate),bastnaesite |
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Isotopes:
1 |
Holmium Other
Other:
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