Where was discovered lanthanum?
Stockholm
Lanthanum was discovered in January 1839 by Carl Gustav Mosander at the Karolinska Institute, Stockholm.
Where can lanthanum be found in the world?
As a rare-earth metal, lanthanum is found in rare-earth minerals such as cerite, monazite, allanite and bastnasite. In monazite and bastnasite, lanthanum can be found in percentages up to 25 percent and 38 percent respectively.
How Lanthanum is produced?
Lanthanum metal is obtained from its oxide by heating it with ammonium chloride or fluoride and hydrofluoric acid at 300-400 °C to produce the chloride or fluoride: La2O3 + 6 NH4Cl → 2 LaCl3 + 6 NH3 + 3 H2O.
What is lanthanum fluoride used for?
Lanthanum fluoride (LaF3) finds uses in fibre optics, electrodes, fluorescent lamps and radiation applications. It is also used as an ion-specific fluoride detecting electrode in solutions. In this case it is doped with Europium at the level of approximately 1%.
Who discovered lanthanum?
Carl Gustaf Mosander
Lanthan/Entdecker
Lanthanum was discovered by Carl Gustaf Mosander, a Swedish chemist, in 1839. Mosander was searching for impurities he believed existed within samples of cerium. He treated cerium nitrate (Ce(NO3)3) with dilute nitric acid (HNO3) and found a new substance he named lanthana (La2O3).
Where did lanthanum get its name?
The element was discovered as the oxide (lanthana) in 1839 by Carl Gustaf Mosander, who distinguished it from cerium oxide (ceria). Its name is derived from the Greek lanthanein, meaning “to be concealed,” indicating that it is difficult to isolate. Lanthanum occurs in the rare-earth minerals monazite and bastnasite.
Where is praseodymium found?
Praseodymium was named after two Greek words, ‚prasios‘, meaning green (reffering to the green colour of its oxide) and ‚didymos‘, meaning twin. Praseodymium can only be found in two types of ore, namely monazite and bastnasite, in China, USA, Brazil, India, Sri Lanka and Australia.
How much lanthanum is left in the world?
The reserves of this element are thought to be in the region of 6 million mt. Despite being one of the ‚rare earths‘, Lanthanum is probably one of the least rare, occurring in a tonnage similar to that of lead and tin combined!
What produces holes in the crystal lattice of a LaF3?
Europium Fluoride (EuF3) produces holes in the crystal lattice of LaF3.
Is LaF3 soluble?
Lanthanum trifluoride, LaF3 , is considered Insoluble in water, so right from the start you know that when the salt is dissolved in water, an equilibrium is established between the undissolved salt and the dissolved ions.