rubidium


Also found in: Thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia.

ru·bid·i·um

 (ro͞o-bĭd′ē-əm)
n. Symbol Rb
A soft silvery-white metallic element of the alkali group that ignites spontaneously in air and reacts violently with water, used in photocells and as a getter in the manufacture of vacuum tubes. Atomic number 37; atomic weight 85.47; melting point 39.30°C; boiling point 688°C; specific gravity (solid) 1.532; valence 1, 2, 3, 4. See Periodic Table.

[From Latin rūbidus, red; see reudh- in Indo-European roots.]

rubidium

(ruːˈbɪdɪəm)
n
(Elements & Compounds) a soft highly reactive radioactive element of the alkali metal group; the 16th most abundant element in the earth's crust (310 parts per million), occurring principally in pollucite, carnallite, and lepidolite. It is used in electronic valves, photocells, and special glass. Symbol: Rb; atomic no: 37; atomic wt: 85.4678; half-life of 87Rb: 5 × 1011 years; valency: 1, 2, 3, or 4; relative density: 1.532 (solid), 1.475 (liquid); melting pt: 39.48°C; boiling pt: 688°C
[C19: from New Latin, from Latin rubidus dark red, with reference to the two red lines in its spectrum]
ruˈbidic adj

ru•bid•i•um

(ruˈbɪd i əm)

n.
a silver-white, metallic, active element resembling potassium, used in photoelectric cells and radio vacuum tubes. Symbol: Rb; at. wt.: 85.47; at. no.: 37; sp. gr.: 1.53 at 20°C.
[< German (1861), = Latin rūbid(us) red (in allusion to the two red lines in its spectrum) + -ium -ium2]
ru•bid′ic, adj.

ru·bid·i·um

(ro͞o-bĭd′ē-əm)
Symbol Rb A soft, silvery-white element that is an alkali metal. It ignites spontaneously in air and reacts violently with water. Rubidium is used in photoelectric cells and in making vacuum tubes. Atomic number 37. See Periodic Table.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.rubidium - a soft silvery metallic element of the alkali metal grouprubidium - a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
carnallite - a white or reddish mineral consisting of hydrous chlorides of potassium and magnesium; used as a fertilizer and as a source of potassium and magnesium
lepidolite - a mineral of the mica group; an important source of lithium
pollucite - a rare mineral that is an important source of cesium
Translations
рубидий
rubidium
rubidium
rubidio
rubiidium
rubidium
rubidij
rubídium
rúbidín
ルビジウム
rubidis
rubidium
rubid
rubidiu
rubidium
rubidij
rubidium
rubidyum

rubidium

[ruːˈbɪdɪəm] Nrubidio m

rubidium

n (Chem) → Rubidium nt
References in periodicals archive ?
Caption: A polycarbonate shell 125 microns thick after a vaporization test of its embedded rubidium and sodium bifluoride
To explain the physics behind the photon interactions, the researchers came up with the following hypothesis: "As a single photon moves through the cloud of rubidium atoms, it briefly lands on a nearby atom before skipping to another atom, like a bee flitting between flowers, until it reaches the other end.
At this point, the rubidium superfluid has regular mass.
Our system incorporates the exceptional performance of Frequencys rubidium atomic standards and Low G sensitivity technology together with FEI-Zyfers expertise in GPS and timing solutions for secure communications.
He slowed down the rubidium atoms beyond the event horizon to create a second horizon, one that kept sound waves out rather than dragging them in.
In tests conducted in a magnetically shielded lab in Berlin, the rubidium cloud sensor was able to detect a magnetic field measuring one-trillionth of a tesla.
SpectraTime awarded 4 Me1/4 contract to supply Rubidium Spaceclocks to the Indian Regional Navigational Satellite System
To stabilize lasers, people use precision spectroscopy with bulk rubidium vapor cells.
3]He polarization by a rubidium spin exchange optical pumping in a birefringence cell, a sapphire cell [8].
The light was halted in a medium made up of rubidium atoms, he told the journal Nature.
The MV89 is a replacement for the Rubidium standard.
At their Pakegama Lake rare metals property in the Red Lake district, the Ontario Geological Survey spent two summers there, and much effort was spent identifying both large size and high concentrations of tantalum, cesium, rubidium, and lithium.