erbium


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erbium

(ûr`bēəm) [from Ytterby, a town in Sweden], metallic chemical element; symbol Er; at. no. 68; at. wt. 167.259; m.p. 1,529°C;; b.p. 2,863°C;; sp. gr. 9.05 at 25°C;; valence +3. Erbium is a soft, malleable, lustrous, silvery metal. It is a member of the lanthanide serieslanthanide series,
a series of metallic elements, included in the rare-earth metals, in Group 3 of the periodic table. Members of the series are often called lanthanides, although lanthanum (atomic number 57) is not always considered a member of the series.
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 in Group 3 of the periodic tableperiodic table,
chart of the elements arranged according to the periodic law discovered by Dmitri I. Mendeleev and revised by Henry G. J. Moseley. In the periodic table the elements are arranged in columns and rows according to increasing atomic number (see the table entitled
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. With other rare earths its oxide occurs in the mineral gadolinite, found in Sweden. Natural erbium is a mixture of 6 stable isotopes; in addition, 10 radioactive isotopes are known. Erbium does not oxidize in air as rapidly as some of the other rare-earth metalsrare-earth metals,
in chemistry, group of metals including those of the lanthanide series and actinide series and usually yttrium, sometimes scandium and thorium, and rarely zirconium. Promethium, which is not found in nature, is not usually considered a rare-earth metal.
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. Erbia is a rose-colored oxide of erbium; it has been used to a very limited extent in glazes and glass as a coloring agent. The discovery of erbium is generally credited to Carl G. Mosander, although he did not succeed in isolating the element. In 1843 he separated from gadolinite three oxide fractions that he called yttria, erbia, and terbia. Later, what he had called terbia became known as erbia and was shown to contain five distinct rare earths, now called erbia, scandia, holmia, thulia, and ytterbia. Fairly pure erbium oxide was first isolated in 1905; fairly pure erbium was isolated in 1934.

Erbium

 

Er, a chemical element. Atomic number, 68; atomic weight, 167.26. Erbium is one of the lanthanides.

erbium

[′ər·bē·əm]
(chemistry)
A trivalent metallic rare-earth element, symbol Er, of the yttrium subgroup, found in euxenite, gadolinite, fergusonite, and xenotine; atomic number 68, atomic weight 167.26, specific gravity 9.051; insoluble in water, soluble in acids; melts at 1400-1500°C.

erbium

a soft malleable silvery-white element of the lanthanide series of metals: used in special alloys, room-temperature lasers, and as a pigment. Symbol: Er; atomic no.: 68; atomic wt.: 167.26; valency: 3; relative density: 9.006; melting pt.: 1529?C; boiling pt.: 2868?C

erbium

A rare earth material used in optical amplifiers. See EDFA.
References in periodicals archive ?
In conclusion, Erbium laser etching imparts clinically acceptable shear bond strength of 13.59 MPa.
They need to understand and see photos that show that the full-field erbium areas will have a yellow fibrinous healing response for the first week or so, which looks very different from the fractional ablative-treated areas (which are more typically red, weepy, and swollen).
Effectiveness of the erbium: YAG laser and new design radial and stripped tips in removing the smear layer after root canal instrumentation.
Sidek, "Influence of erbium concentration on spectroscopic properties of tellurite based glass," Solid State Science and Technology, vol.
Histopathological studies in animals and humans have shown that pulpal tissues underlying deep cavity preparations realized with an erbium
Immediately after erbium excision: laser-assisted gingivoplasty procedure.
Erbium laser is the laser of choice for the osseus reduction.
Milori Corona, "Water flow on erbium:yttrium-aluminum-garnet laser irradiation: effects on dental tissues," Lasers in Medical Science, vol.
Namavar, "Photoluminescence excitation measurements on erbium implanted GaN," Journal of Applied Physics, vol.
Other EDFA parameters: erbium doped fibre (EDF) length l =14 m, pumping laser power P = 40 mW.
Sandstonea[euro](tm)s product line includes a laser combining carbon dioxide (CO2) and Erbium YAG -- the two sector standards for deep skin resurfacing and superficial rejuvenation; a laser for the treatment of tattoos and pigmented lesions as well as superficial skin rejuvenation; a laser for hair reduction, acne, vascular and pigmented lesions and skin rejuvenation; and a laser for permanent hair reduction.
The varied topics include: a study of the mechanics state of concrete under penetration and the deceleration of projectiles, an experimental study of natural sedimentation in heavy oil, a survey on microgrid technology, research on the effect of erbium salt in the anodization of aluminum, the effects of adding TiC powders to VANADIS 4 tool steel by HIP treatment, developing an effective multipurpose polymer-bitumen compositions, and more.