| 单词 | grey tin |
| 释义 | > as lemmasgrey tin grey tin n. Chemistry †(a) bismuth (obsolete); (b) a grey powdery allotrope of tin, to which ordinary (white) tin is converted at low temperatures. ΘΚΠ society > occupation and work > materials > derived or manufactured material > metal > base metal > [noun] > tin > types of white tin1562 mine tin1602 grain tin1668 phosphor tin1668 pillion1778 grey tin1804 prillion1821 1804 W. Nicholson tr. A.-F. de Fourcroy Gen. Syst. Chem. Knowl. V. 266 Bismuth..has been successively named, according to the various and often erroneous notions which each author gave of it, grey tin, grey lead and saturn, white antimony, [etc.]. 1879 Pop. Sci. Rev. 3 425 Specimens of the gray tin described by Fritzsche were found to have a density of 6.020, 6.002, and 8.930. 1933 Jrnl. Royal Aeronaut. Soc. 37 540 Tin..becomes increasingly brittle at lower temperatures, until, at 18°C., the change to its allotropic form, ‘grey tin’, commences. 1975 H. M. Rosenberg Solid State i. 7 Tin also has a diamond-structure allotrope ‘grey tin’ which is stable below about −40°C. 2010 D. L. Reger et al. Chemistry (ed. 3) xx. 874 Gray tin is a nonmetallic form that is quite brittle and is not an electrical conductor. < as lemmas |
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