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Holmium is a chemical element with symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a rare earth element. Holmium was discovered by Swedish chemist Per Theodor Cleve. Its oxide was first isolated from rare earth ores in 1878.Elemental holmium is a relatively soft and malleable silvery-white metal. It is too reactive to be found uncombined in nature, but when isolated, is relatively stable in dry air at room temperature.
H 8181 (OTTO) Holmium, pieces or lumps, 10-30 mm, 99.9% Cas 7440-60-0 - used in the same way as some other rare earths in certain laser and glass-colorant applications.
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1313-97-9
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12064-62-9
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34054-55-2
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