Samarium in a sentence

Insoluble salts of samarium are non-toxic and the soluble ones are only slightly toxic. citation When ingested, only about 0.05% of samarium salts is absorbed into the bloodstream and the remainder is excreted.

Its advantage compared to competing materials, such as boron and cadmium, is stability of absorption – most of the fusion and decay products of samarium-149 are other isotopes of samarium that are also good neutron absorbers.

With the boiling point of 1794 °C, samarium is the third most volatile lanthanide after ytterbium and europium ; this property facilitates separation of samarium from the mineral ore.

There are very strong positive correlations between neodymium and praseodymium, samarium, terbium, gadolinium and dysprosium suggesting a favourable geological environment for rare earth elements.

Also, thin films of samarium obtained by vapor deposition may contain the hcp or dhcp phases at ambient conditions.

At ambient conditions, samarium normally assumes a rhombohedral structure (α form).

Click here for more information. main infobox Samarium is a chemical element with symbol Sm and atomic number 62. It is a moderately hard silvery metal that readily oxidizes in air.

Contrary to cyclopentadienides of most other lanthanides, in Sm(C 5 H 5 ) 3 some C 5 H 5 rings bridge each other by forming ring vertexes η 1 or edges η 2 toward another neighboring samarium atom, thereby creating polymeric chains.

Domination of samarium in minerals is unique.

However, a few plants and vegetables may contain up to 1 part per million of samarium.

However, they are not superior in every aspect, as neodymium-based magnets lose their magnetism at lower temperatures and tend to rust, while samarium-cobalt magnets do not.

In 1973, mendelevium(I) was reported to have been produced by Russian scientists, who obtained it by reducing higher oxidation states of mendelevium with samarium (II).

In one study, the dhcp phase could be produced without compression, using a nonequilibrium annealing regime with a rapid temperature change between about 400 and 700 °C, confirming the transient character of this samarium phase.

Isotopes main Naturally occurring samarium has a radioactivity of 128 Bq /g.

It can be prepared by annealing at 1100 °C an evacuated quartz ampoule containing mixed powders of phosphorus and samarium.

It is also synthesized upon neutron capture by samarium-149, which is added to the control rods of nuclear reactors.

Lanthanide oxides: clockwise from top center: praseodymium, cerium, lanthanum, neodymium, samarium and gadolinium.

Many properties of promethium rely on its position among lanthanides and are intermediate between those of neodymium and samarium.

Nowadays, a similar commodity product has the name "samarium-europium- gadolinium " (SEG) concentrate.

Samarium and thulium also behave this way in the +2 state, but europium (II) is stable in aqueous solution.