| 释义 |
plumbous, a.|ˈplʌmbəs|
[ad. L. plumbōs-us full of lead: see -ous. Cf. F. plombeux.]
†1. Leaden; fig. dull; = plumbeous. Obs.
1685H. More Illustration 336 Such a senseless conceit, that nothing can be more wooden or plumbous. 1737G. Smith Curious Relations I. iv. 550 To be of a plumbous or leaden Temper and Colour.
2. Chem. Applied to compounds in which lead is bivalent; as in plumbous acid, ‘term for plumbi oxidum in combination with potassium and other bases’ (Syd. Soc. Lex.). Cf. plumbic a. Formerly also applied by some writers to substances in which lead was thought to be univalent (cf. plumbic a. a).
1854R. D. Thomson Cycl. Chem. 327/2 Protoxide of Lead. Yellow Oxide, Massicot, Litharge, Plumbous Acid. PbO. 1868W. A. Miller Elements of Chemistry (ed. 4) ii. xviii. 721 When heated in closed vessels, part of the sulphur is expelled, and a subsulphide, or plumbous sulphide (Pb2S) is left. 1883C. L. Bloxam Chem. (ed. 5) 373 Oxide or protoxide of lead (plumbous oxide) is prepared on a large scale by heating lead in air. 1884Frankland & Japp Inorg. Chem. xxxix. 699 Plumbous oxide, ‘Pb’2O, is best prepared by heating plumbic oxalate to 300° with exclusion of air... It is a black powder. 1892Morley & Muir Watts' Dict. Chem. (rev. ed.) III. 128/2 Lead protoxide PbO. (Plumbous oxide. Litharge. Massicot.) 1900W. A. Shenstone Elem. Inorg. Chem. xxix. 439 Plumbous oxide (Pb2O). When oxalate of lead is heated to 300° out of contact with air, it leaves a grey residue which absorbs oxygen with avidity. This is the suboxide. 1926P. C. L. Thorne tr. Ephraim's Text-bk. Inorg. Chem. xv. 359 When red lead, Pb3O4 (i.e. 2PbO.PbO2), is treated with nitric acid, the plumbous portion of this compound dissolves, leaving PbO2 as a brown powder. 1950[see plumbic a. a]. 1962P. J. & B. Durrant Adv. Inorg. Chem. xviii. 638 Plumbous nitrate, (Pb(NO3)2, is made by dissolving lead, lead oxide, or lead carbonate in dilute nitric acid... Concentrated sodium hydroxide solution dissolves plumbous chromate. |