Crossword clues for terbium
The Collaborative International Dictionary
Terbium \Ter"bi*um\, n. [NL., fr. Ytterby, in Sweden. See Erbium.] (Chem.) A rare metallic element, found in certain minerals, as gadolinite and samarskite, with other rare earths such as ytterbium. Symbol Tb. Atomic number 65. Atomic weight 158.925.
Douglas Harper's Etymology Dictionary
1843, from Latinized form of Ytterby, Swedish town near the place where mineral containing the element was found (see Ytterbium) + -ium.\n
Wiktionary
n. a metallic chemical element (''symbol'' Tb) with an atomic number of 65
WordNet
n. a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite [syn: Tb, atomic number 65]
Wikipedia
Terbium is a chemical element with symbol Tb and atomic number 65. It is a silvery-white rare earth metal that is malleable, ductile and soft enough to be cut with a knife. Terbium is never found in nature as a free element, but it is contained in many minerals, including cerite, gadolinite, monazite, xenotime and euxenite.
Swedish chemist Carl Gustaf Mosander discovered terbium as a separate elemental compound in 1843. He detected it as an impurity in yttrium oxide, YO. Yttrium and terbium are named after the village of Ytterby in Sweden. Terbium was not isolated in pure form until the advent of ion exchange techniques.
Terbium is used to dope calcium fluoride, calcium tungstate and strontium molybdate, materials that are used in solid-state devices, and as a crystal stabilizer of fuel cells which operate at elevated temperatures. As a component of Terfenol-D (an alloy that expands and contracts when exposed to magnetic fields more than any other alloy), terbium is of use in actuators, in naval sonar systems and in sensors.
Most of the world's terbium supply is used in green phosphors. Terbium oxide is in fluorescent lamps and TV tubes. Terbium green phosphors are combined with divalent europium blue phosphors and trivalent europium red phosphors to provide "trichromatic" lighting technology, a high-efficiency white light used for standard illumination in indoor lighting.
Usage examples of "terbium".
Little adhesive labels were stuck to some of them, identifying them as terbium, tantalum, promethium.
This may readily be done by adding terbium oxide with a little xerion to the silica.
Firstly, the silica contains a new catalyst, terbium oxide, one of the rare earths.
It would be more accurate to say it causes the silicon and terbium to react to provide the necessary reaction heat.