lanthanides


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lan·tha·nides

(lan'thă-nīdz),
Those elements with atomic numbers 57-71 that closely resemble one another chemically and were formerly difficult to separate from one another. they vary in the electrons in the 4f orbital.
Synonym(s): rare earth elements
[lanthanum, first element of the series]

lan·tha·nides

(lan'thă-nīdz)
Those elements with atomic numbers 57-71 that closely resemble one another chemically and were formerly difficult to differentiate.
[lanthanum, first element of the series]
References in periodicals archive ?
Following salts of lanthanides were used as standards: Samarium (III) chloride hexahydrate, Lanthanum (III) nitrate hexahydrate, Europium (III) nitrate hexahydrate, Terbium (III) nitrate hexahydrate, Holmium(III) nitrate hydrate, Thulium (III) nitrate hexahydrate, Lutetium (III) nitrate hexahydrate, Erbium (III) nitrate hexahydrate, Samarium (III) nitrate hexahydrate, Neodymium (III) nitrate hexahydrate, Gadolinium (III) nitrate hexahydrate, Dysprosium (III) nitrate pentahydrate, Ytterbium (III) nitrate pentahydrate, and Cerium (III) nitrate hexahydrate.
In the geochemistry of rare earth elements of the sedimentary processes, the differentiation in behavior and abnormal redistributions of lanthanides within the REE composition are probably impossible without the participation of the oil and gas hydrocarbons determining the redox conditions of the environment, and never pass without the isomorphism of lanthanides.
For the nuclei included in our study, all chains of lanthanides begins as vibrational with R(4/2) near 2.
Although the lanthanides are 'rare earths' some, like neodymium, actually occur more frequently than many more common metals.
Research works regardihg the obtaining of an electrode micro-alloyed with lanthanides for electric arc clading.
In the same samples, TSH and 17-OHP were measured according to the instruction manuals of the dissociation-enhanced lanthanide fluorescence immunoassay (DELFIA[R]) test kits Neonatal 17a-hydroxyprogesterone and Neonatal hTSH (PerkinElmer).
provide a theoretical description of spectroscopic properties of lanthanides doped in various materials.
Synergistic solvent extraction and separation of lanthanides using mixtures of 1-phenyl -3-methyl -4-benzoyl-pyrazol-5-one and aliquat 336: influence of the ammonium salt anion.
The technique uses compounds of a group of heavy metals called lanthanides, which can be detected with the use of fluorescent light.
The emphasis of this announcement is on the ions, complexes, and organometallic compounds of the transition metals known as lanthanides and actinides, post-transition metals, and metalloid elements.
Epsilon 5 excels at trace analysis of heavy elements such as As, Pb, Cd, and the lanthanides in concentrations from 100% down to sub-ppm levels.
Experiments at low energy, below 8 keV, at the K edges of the early transition metals and the L edges of early lanthanides have been more difficult to perform, because of absorption by the Be windows in the beam line and by the samples themselves.