holmium
chemical element with symbol Ho and atomic number 67
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Summary
holmium is a chemical element[1]. holmium draws 2,841 Wikipedia views per month (chemical element category, ranking #86 of 144).[2]
Key Facts
- Discoverer or inventor: Per Teodor Cleve[3], Marc Delafontaine[4], Jacques-Louis Soret[5]
- Named after: Stockholm[6]
- Made from material: monazite sands[7], gadolinite group[8], monazite mineral group[9]
- Location of discovery: Geneva[10], Uppsala[11]
- Canonical SMILES: [Ho][12]
- Element symbol: Ho[13]
- Chemical formula: Ho[14]
- Subclass of: lanthanide[15], f-block[16]
- Part of: lanthanide[17], period 6[18]
- Has use: pole piece[19], nuclear poison[20]
- Commons category: Holmium[21]
- Unicode character: 鈥[22]
- Crystal system: hexagonal crystal system[23]
- Time of discovery or invention: January 1, 1878[24]
- Point group: dihexagonal-dipyramidal[25]
- Space group: space group P6₃/mmc[26]
- IPA transcription: ˈhoʊlmiəm[27]
- Topic's main category: Category:Holmium[28]
- Commons gallery: Holmium[29]
- Atomic number: 67[30]
- Electronegativity: 1.23[31]
- Oxidation state: 2[32], 3[33], 0[34], 1[35]
- Described by source: Brockhaus and Efron Encyclopedic Dictionary[36], Great Soviet Encyclopedia (1926–1947)[37], Armenian Soviet Encyclopedia, vol. 6[38]
- Has characteristic: paramagnetism[39]
- Different from: Ho[40]
Why It Matters
holmium has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[41] holmium is known by 33 alternative names across languages and contexts.[42]