PROPERTIES, APPLICATIONS AND RESEARCH
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Advanced Materials Information Center | Samarium Products
PROPERTIES OF SAMARIUM
| Melting Point | 1074°C |
| Boiling Point | 1794°C |
| Density | 7.54 g/cm3 |
| Crystal Structure | dhcp |
| Metallic Radius | 180 pm |
| Valency | 3 |
| Magnetic Moment | 0.85µB |
APPLICATIONS OF SAMARIUM
Samarium is primarily utilized in the production of samarium-cobalt (Sm2Co17) permanent magnets. It is also used in laser applications and for its dielectric properties.
Samarium-cobalt magnets replaced the more expensive platinum-cobalt magnets in the early 1970s. While now overshadowed by the less expensive neodymium-iron-boron magnet, they are still valued for their ability to function at high temeratures. They are utilized in lightweight electronic equipment where size or space is a limiting factor and where functionality at high temperature is a concern. Applications include electronic watches, aeospace equipment, microwave technology and servomotors.
Because of its weak spectral absorption band samarium is used in the filter glass on Nd:YAG solid state lasers to surround the laser rod to improve efficiency by absorbing stray emissions.
Samarium forms stable titanate compounds with useful dielectric properties suitable for coatings and in capacitors at microwave frequencies.
RECENT SAMARIUM RESEARCH
1. Yeh MCP, Wang FC, Tu JJ, et al.
Samarium diiodide-promoted intramolecular radical cyclization of
(eta(4)-diene)Fe,(CO)(3) complexes bearing keto side chains
ORGANOMETALLICS 17: (26) 5656-5662 DEC 21 1998
2. Park HS, Lee IS, Kwon DW, et al.
Reductive intramolecular cyclization of alpha-bromo silyl ethers mediated by
samarium diiodide
CHEM COMMUN (24) 2745-2746 DEC 21 1998
3. Zhou LH, Zhang YM
Facile synthesis of amidines via the intermolecular reductive coupting of nitriles with
nitro compounds induced by samarium(II)iodde
J CHEM RES-S (9) 596-597 SEP 1998
4. Hou ZM, Tezuka H, Zhang YG, et al.
One-step block-copolymerization of ethylene with styrene by C5Me5/ER-ligated
samarium(II) complexes (ER = OAr, SAr)
MACROMOLECULES 31: (24) 8650-8652 DEC 1 1998
5. Spirlet MR, Goffart J
Dicyclopentadienyl complexes of samarium(III): [Sm(eta(5))
C5H4SiMe3)(2)(Mu-Cl)(2)
ACTA CRYSTALLOGR C 54: 1624-1626 Part II NOV 15 1998
6. van Rensburg AJ, Alberts AS, Louw WKA
Quantifying the radiation dosage to individual skeletal lesions treated with
samarium-153
EDTMP
JNUCL MED 39: (12) 2110-2115 DEC 1998
7. Evans WJ, Forrestal KJ, Ziller JW
Isopropyltetramethylcyclopentadienyl samarium chemistry: structural studies of
divalent (C5Me4Pr)-Pr-i)Sm(TH F) and mixed valent [((C5Me4Pr)-Pr-I)(2)
Sm](2)(mu-Cl)
POLYHEDRON 17: (23-24) 4015-46"98
8. Hillier AC, Sella A, Elsegood MRJ
Isocarbonyl complexes of divalent samarium and ytterbium. The molecular structures
of [{Ln(Tp(tBu,Me))(THF) (mu-CO)(2)Mo-(eta-C5H4Me)(CO)}(2)](2)(Ln=Sm, Yb)
J CHEM SOC DALTON (22) 3871-3874 NOV 21 1998
9. Bennett SM, Biboutou RK, Salari BSF
Studies on the diastereoselectivity of samarium(II) iodide mediated reductive
carbocyclizations of omega-iodo-alpha, beta-unsaturated esters prepared from
2-deoxy-D-ribose (vol 39. pg 7075, 1998)
TETRAHEDRON LETT 39: (51) 9313-9313 DEC 17 1998
10. Molander GA, Wolfe CN
Intramolecular ketone-nitrile reductive coupling reactions promoted by samarium( II)
iodide
J ORG CHEM 63: (24) 9031-9036 NOV 27 1998
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