| 释义 |
platiniridium Min.|ˌplætɪnɪˈrɪdɪəm|
Also platino-iridium.
[f. platin-um + iridium.]
A native alloy of platinum and iridium, occurring in small grains or cubes with truncated angles, of a white colour.
1848J. D. Dana Man. Mineral. vi. 309 A similar platin-iridium has been obtained at Ava in the East Indies. 1888Encycl. Brit. XXIV. 480/1 The new standard of the International Metric Commission is a line-standard of platino-iridium, 40 inches long. 1908Practitioner Sept. 485 The best needle to use is one of platino-iridium, since it can be rendered absolutely sterile in the flame of a spirit lamp. 1965G. J. Williams Econ. Geol. N.Z. x. 154/2 Farquharson (1910) quoted earlier reports on the occurrence of ‘osmiridium’ and ‘platiniridium’ in the Tertiary auriferous quartzose conglomerates..in north⁓western Nelson. |