samariumn.

Brit.

/səˈmɛːrɪəm/, U.S.

/səˈmɛriəm/

Etymology: modern Latin, coined in French (P.-É. Lecoq de Boisbaudran 1879, in Compt. Rend. LXXXIX. 214): see samarskite n. and -ium suffix.

Chemistry.

A hard grey metallic element of the lanthanide series, found in small quantities in monazite sand, samarskite, and other rare earth minerals. Symbol Sm; atomic number 62.

ΘΚΠ

the world > matter > chemistry > elements and compounds > metals > [noun] > unknown

didymium1842

hydrogenium1868

samarium1879

actinium1881

the world > matter > chemistry > elements and compounds > metals > specific elements > samarium > [noun]

samarium1879

1879 Jrnl. Chem. Soc. 36 890 A new metal to which the author gives the name Samarium.

1907 Athenæum 31 Aug. 244/3 A sulphide of calcium containing a trace of the rare element samarium.

1923 U. R. Evans Metals & Metallic Compounds II. 233 If an attempt is to be made to obtain pure compounds of samarium, europium, or gadolinium, the double magnesium salts are more satisfactory.

1955 Sci. News Let. 12 Mar. 164/1 Rare earth metals, such as samarium and europium, have long remained a mystery, simply because there was not enough of them available to find out what they could be used for.

1969 New Scientist 28 Aug. 430/2 Storage densities of 100 000 bits of information per square inch may be achieved with an orthoferrite containing samarium and terbium.

1974 Encycl. Brit. Micropædia VIII. 829/2 In addition to its more stable trivalent state, samarium..has a +2 oxidation state... Trivalent samarium..forms a series of yellow salts and solutions.

1977 Gramophone Oct. 590/1 (advt.) It has an unusually tiny, samarium cobalt (rare earth) magnet of remarkably high power.

1980 Sunday Times 24 Aug. 14/8 The magnet within which the coil fits is now made of samarium cobalt.

Derivatives

saˈmaria n. the oxide Sm₂O₃, a cream-coloured solid.

ΘΚΠ

the world > matter > chemistry > elements and compounds > metals > specific elements > samarium > [noun] > compounds

samaria1885

1885 Jrnl. Chem. Soc. 48 ii. 1025 The spectrum of a phosphorescent mixture of samaria 90 parts, and yttria 10 parts, in high vacua, shows none of the lines of yttrium, but is almost a facsimile of the spectrum of pure samarium.

1898 W. Crookes Addr. Brit. Assoc. 23 The persistence of the samarium spectrum in presence of overwhelming quantities of other metals, is almost unexampled in spectroscopy: thus one part of samaria can easily be seen when mixed with three million parts of lime.

1974 Encycl. Brit. Macropædia XV. 516/1 Mosander's didymia was resolved into several oxides—samaria (samarium; 1879), praseodymia.., neodymia.., and europia.

This entry has not yet been fully updated (first published 1909; most recently modified version published online March 2022).

单词	samarium
释义	samariumn. Brit. /səˈmɛːrɪəm/, U.S. /səˈmɛriəm/ Etymology: modern Latin, coined in French (P.-É. Lecoq de Boisbaudran 1879, in Compt. Rend. LXXXIX. 214): see samarskite n. and -ium suffix. Chemistry. A hard grey metallic element of the lanthanide series, found in small quantities in monazite sand, samarskite, and other rare earth minerals. Symbol Sm; atomic number 62. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > [noun] > unknown didymium1842 hydrogenium1868 samarium1879 actinium1881 the world > matter > chemistry > elements and compounds > metals > specific elements > samarium > [noun] samarium1879 1879 Jrnl. Chem. Soc. 36 890 A new metal to which the author gives the name Samarium. 1907 Athenæum 31 Aug. 244/3 A sulphide of calcium containing a trace of the rare element samarium. 1923 U. R. Evans Metals & Metallic Compounds II. 233 If an attempt is to be made to obtain pure compounds of samarium, europium, or gadolinium, the double magnesium salts are more satisfactory. 1955 Sci. News Let. 12 Mar. 164/1 Rare earth metals, such as samarium and europium, have long remained a mystery, simply because there was not enough of them available to find out what they could be used for. 1969 New Scientist 28 Aug. 430/2 Storage densities of 100 000 bits of information per square inch may be achieved with an orthoferrite containing samarium and terbium. 1974 Encycl. Brit. Micropædia VIII. 829/2 In addition to its more stable trivalent state, samarium..has a +2 oxidation state... Trivalent samarium..forms a series of yellow salts and solutions. 1977 Gramophone Oct. 590/1 (advt.) It has an unusually tiny, samarium cobalt (rare earth) magnet of remarkably high power. 1980 Sunday Times 24 Aug. 14/8 The magnet within which the coil fits is now made of samarium cobalt. Derivatives saˈmaria n. the oxide Sm₂O₃, a cream-coloured solid. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > samarium > [noun] > compounds samaria1885 1885 Jrnl. Chem. Soc. 48 ii. 1025 The spectrum of a phosphorescent mixture of samaria 90 parts, and yttria 10 parts, in high vacua, shows none of the lines of yttrium, but is almost a facsimile of the spectrum of pure samarium. 1898 W. Crookes Addr. Brit. Assoc. 23 The persistence of the samarium spectrum in presence of overwhelming quantities of other metals, is almost unexampled in spectroscopy: thus one part of samaria can easily be seen when mixed with three million parts of lime. 1974 Encycl. Brit. Macropædia XV. 516/1 Mosander's didymia was resolved into several oxides—samaria (samarium; 1879), praseodymia.., neodymia.., and europia. This entry has not yet been fully updated (first published 1909; most recently modified version published online March 2022). < n.1879
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