Elements of the month - Holmium (Ho) & Thulium (Tm)

2019-11-07

This year it's 150 years ago that Dmítriy Ivánovich Mendeléyev first published the Periodic Law that would later become the periodic table. Unesco has decided to celebrate this by calling 2019 "International Year of the Periodic Table of Chemical Elements" (IYPT).

Holmium and Thulium is the 12th and 13th element in our series of elements found by Swedish researchers.

Holmium, just like the other rare earth metals, has some kind of interesting magnetic property. For example, this is effectively used in magnetic cameras. Another area of ​​application for holmium is in laser surgery. There, holmium is often used as an additive in solid lasers of yttrium aluminum garnet crystals. Color centers are formed by pollutants of holmium in crystal and glass. They store optical energy released in the form of a laser pulse.

Holmium was first discovered by scientists Jacques-Loius Soret and Marc Delafontaine in 1878, they named it "element x". Within a year, the element was discovered once more. This time by Per Teodor Cleve when he studied ore containing erbium oxide. The discovery occurred because holmium appeared as a contaminant in his sample. It is also Cleve who named the element "holmia" after Stockholm.

Thulium is a metallic element that belongs to the lanthanoids and the rare earth metals. Pure tulium is a silver-white, malleable, air-resistant metal that can be easily cut with a knife. It is only very sparse in the earth's crust and the main source of raw materials is monazite sand.

Thulium was also discovered by Per Teodor Cleve and he named it Tulium after Thule, the Latin term for the Nordics.

Fler nyheter

Elements of the month - Holmium (Ho) & Thulium (Tm)

2019-11-07

This year it's 150 years ago that Dmítriy Ivánovich Mendeléyev first published the Periodic Law that would later become the periodic table. Unesco has decided to celebrate this by calling 2019 "International Year of the Periodic Table of Chemical Elements" (IYPT).

Holmium and Thulium is the 12th and 13th element in our series of elements found by Swedish researchers.

Holmium, just like the other rare earth metals, has some kind of interesting magnetic property. For example, this is effectively used in magnetic cameras. Another area of ​​application for holmium is in laser surgery. There, holmium is often used as an additive in solid lasers of yttrium aluminum garnet crystals. Color centers are formed by pollutants of holmium in crystal and glass. They store optical energy released in the form of a laser pulse.

Holmium was first discovered by scientists Jacques-Loius Soret and Marc Delafontaine in 1878, they named it "element x". Within a year, the element was discovered once more. This time by Per Teodor Cleve when he studied ore containing erbium oxide. The discovery occurred because holmium appeared as a contaminant in his sample. It is also Cleve who named the element "holmia" after Stockholm.

Thulium is a metallic element that belongs to the lanthanoids and the rare earth metals. Pure tulium is a silver-white, malleable, air-resistant metal that can be easily cut with a knife. It is only very sparse in the earth's crust and the main source of raw materials is monazite sand.

Thulium was also discovered by Per Teodor Cleve and he named it Tulium after Thule, the Latin term for the Nordics.