| Lanthanide Holmium was discovered by Swiss chemist Jacques-Louis Soret in 1878 - 1879 who, while he was working on erbia earth, noticed the aberrant spectrographic absorption bands of the then-unknown element and called it "Element X". In 1879 Swedish chemist Cleve extracted Soret& |
| Lanthanide Holmium crustal abundance is 1.3x10-4 mass %, in sea water 2.2x10-7 mg/L. As other rare earth elements it is contained in many minerals, including gadolinite, monazite, bastnasite, euxenite and apatite. |
| Holmium is reduced from HoF3 by calcium |