n. Symbol Ho A relatively soft, lustrous, malleable element of the lanthanide series, with unusual magnetic properties including the highest magnetic moment of any naturally occurring element, found in minerals such as gadolinite and monazite. Atomic number 67; atomic weight 164.930; melting point 1,462°C; boiling point 2,700°C; specific gravity 8.795; valence 3. See Periodic Table. [After Holmia (Stockholm), Sweden.] |
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