Thulium(III) oxide is a pale green solid compound, with the formula
Tm2 O3. It was first isolated in 1879, from an impure sample of
erbia
Erbium(III) oxide is the inorganic compound with the formula . It is a pink paramagnetic solid. It finds uses in various optical materials.
Structure
Erbium(III) oxide has a cubic structure resembling the bixbyite motif. The Er3+ centers are o ...
, by
Swedish
Swedish or ' may refer to:
Anything from or related to Sweden, a country in Northern Europe. Or, specifically:
* Swedish language, a North Germanic language spoken primarily in Sweden and Finland
** Swedish alphabet, the official alphabet used by ...
chemist
A chemist (from Greek ''chēm(ía)'' alchemy; replacing ''chymist'' from Medieval Latin ''alchemist'') is a scientist trained in the study of chemistry. Chemists study the composition of matter and its properties. Chemists carefully describe th ...
Per Teodor Cleve
Per Teodor Cleve (10 February 1840 – 18 June 1905) was a Swedish chemist, biologist, mineralogist and oceanographer. He is best known for his discovery of the chemical elements holmium and thulium.
Born in Stockholm in 1840, Cleve earned his B ...
, who named it ''thulia''.
It can be prepared in the laboratory by burning
thulium
Thulium is a chemical element with the symbol Tm and atomic number 69. It is the thirteenth and third-last element in the lanthanide series. Like the other lanthanides, the most common oxidation state is +3, seen in its oxide, halides and other c ...
metal in air, or by decomposition of their oxoacid salts, such as thulium nitrate.
References
{{Oxides
Thulium compounds
Sesquioxides