| 释义 |
selen-, prefix|ˈsɛlən|
1. Min. [After G. selen selenium.] In names of certain minerals containing or formerly supposed to contain selenium, as † ˌselenˈcuprite = berzelianite. † ˌselenˈpalladite, -paˈlladium = allopalladium. † ˌselenˈsilver = naumannite. ˌselenˈsulphur, a native variety of elemental sulphur containing a small proportion of selenium. ˌselenteˈllurium, a native compound of selenium and tellurium.
1835C. U. Shepard Treat. Min. (ed. 2) II. 177 Selen-cuprite. Ibid., Selenpalladite. 1849J. Nicol Man. Min. 506 Selen-sulphur. 1857Dana Man. Min. (1862) 327 Another seleniferous ore, from the Hartz, called selensilver. 1882[see hieratite]. 1890E. S. Dana & H. L. Wells in Amer. Jrnl. Sci. Ser. iii. XL. 79 We propose to call it Selen-tellurium. 1944C. Palache et al. Dana's Syst. Min. (ed. 7) I. 142 Old specimens of reddish brown selensulfur from Vulcano gave n [sc. refractive index] 2·544–2.675 indicating 83–90·5 per cent Se; but this high Se content lacks confirmation.
†2. Chem. [For seleno-, selenio-.] Formerly used (before a vowel or h) in names of certain compounds containing selenium. seleˈnaldine [aldehyde) + -ine5], a basic substance produced by the action of hydrogen selenide on ammonium aldehydate. selenethyl, ethyl selenide. selenhydric a. = hydroselenic (acid): see hydro-. selenhydrate (see quot. 1858).
1848Brande Chem. (ed. 6) II. iii. 173 With seleniuretted hydrogen aldehyde-ammonia yields Selenaldine. 1853Watts tr. Gmelin's Hand-bk. Chem. VIII. 356 Selenide of Ethyl or Selenethyl. 1858Mayne Expos. Lex., Selenhydrate, term by Berzelius for the combinations of hydric selenide with the metallic seleniurets which contain the radicals of alkalis and alkaline earths. 1868Watts Dict. Chem. V. 218 Selen⁓hydric Acid. |