Lutetium in a sentence

Charles James, who stayed out of the priority argument, worked on a much larger scale and possessed the largest supply of lutetium at the time. citation Pure lutetium metal was first produced in 1953.

Precautions Like other rare-earth metals, lutetium is regarded as having a low degree of toxicity, but its compounds should be handled with care nonetheless: for example, lutetium fluoride inhalation is dangerous and the compound irritates skin.

His research eventually led to a paper on a promising lutetium-hydrogen-nitrogen compound and experimental results that were consistent with superconductivity.

Accordingly, lutetium rather than lanthanum was assigned to group 3 by some chemists in the 1920s and 30s.

Aqueous solutions of most lutetium salts are colorless and form white crystalline solids upon drying, with the common exception of the iodide.

For example, lutetium was named in reference to Paris, France.

He chose the name lutecium for the new element, but in 1949 the spelling of element 71 was changed to lutetium.

However, this position has sometimes been disputed, on the grounds that yttrium and to a lesser extent scandium are closer in their chemical properties to lutetium than lanthanum.

Human diets have not been monitored for lutetium content, so it is not known how much the average human takes in, but estimations show the amount is only about several micrograms per year, all coming from tiny amounts taken by plants.

Isotopes lighter than the stable lutetium-175 decay via electron capture (to produce isotopes of ytterbium ), with some alpha and positron emission ; the heavier isotopes decay primarily via beta decay, producing hafnium isotopes.

Lutetium (Lu) and lawrencium (Lr) occupy the two positions below yttrium.

Lutetium nitrate may be dangerous as it may explode and burn once heated.

Lutetium oxide powder is toxic as well if inhaled or ingested.

Lutetium salts are known to occur together with other lanthanide salts in nature; the element is the least abundant in the human body of all lanthanides.

Lutetium salts are then selectively washed out by suitable complexing agent.

Lutetium's compounds always contain the element in the oxidation state +3.

Lutetium usually occurs in association with the element yttrium and is sometimes used in metal alloys and as a catalyst in various chemical reactions.

Occurrence and production Monazite Found with almost all other rare-earth metals but never by itself, lutetium is very difficult to separate from other elements.

Physical properties Magnetic and spectroscopic All the trivalent lanthanide ions, except lanthanum and lutetium, have unpaired f electrons.

See, for example: citation Early techniques for chemically separating scandium, yttrium and lutetium relied on the fact that these elements occurred together in the so-called "yttrium group" whereas La and Ac occurred together in the "cerium group".