platiniridiumn.

Brit.

/ˌplatᵻnᵻˈrɪdɪəm/, U.S.

/ˈˌplætnˌɪˈrɪdiəm/

Origin: Formed within English, by compounding. Etymons: platinum n., iridium n.

Etymology: < platin- (in platinum n.) + iridium n. Compare later platinum-iridium n. at platinum n. and adj. Compounds 1b.

Mineralogy and Metallurgy.

An alloy of platinum and iridium, esp. when occurring naturally, typically as white rounded or angular grains.

ΘΚΠ

the world > the earth > minerals > types of mineral > native elements and alloys > [noun] > native alloys

iridosmine1827

platiniridium1848

allemontite1850

sysertskite1850

nevyanskite1854

osmiridium1854

shakudo1860

bismuth-silver1863

telluric bismuth1866

wehrlite1874

josephinite1892

1848 J. D. Dana Man. Mineral. vi. 309 A similar platin-iridium has been obtained at Ava in the East Indies.

1886 Proc. Amer. Philos. Soc. 23 31 Aqua regia dissolves some of the grains very slowly... Other grains are hardly acted upon and are probably iridium or platin-iridium.

1935 A. H. G. Palmer & K. S. Snell Mechanics ii. 14 The International Metre..is the distance between two lines on a bar of platiniridium kept at Sèvres.

1981 Technol. & Culture 22 146 The presence of inclusions of platiniridium in objects of gold from the Royal Cemetery at Ur suggested the use of gold from the distant Pactolus River in western Anatolia.

1992 Amer. Mineralogist 77 213/2 The consequence of the redefinition of the mineral names applicable to the Ru-Os-Ir ternary system..is that..platiniridium is merely platinum iridium.

This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).

单词	platiniridium
释义	platiniridiumn. Brit. /ˌplatᵻnᵻˈrɪdɪəm/, U.S. /ˈˌplætnˌɪˈrɪdiəm/ Origin: Formed within English, by compounding. Etymons: platinum n., iridium n. Etymology: < platin- (in platinum n.) + iridium n. Compare later platinum-iridium n. at platinum n. and adj. Compounds 1b. Mineralogy and Metallurgy. An alloy of platinum and iridium, esp. when occurring naturally, typically as white rounded or angular grains. ΘΚΠ the world > the earth > minerals > types of mineral > native elements and alloys > [noun] > native alloys iridosmine1827 platiniridium1848 allemontite1850 sysertskite1850 nevyanskite1854 osmiridium1854 shakudo1860 bismuth-silver1863 telluric bismuth1866 wehrlite1874 josephinite1892 1848 J. D. Dana Man. Mineral. vi. 309 A similar platin-iridium has been obtained at Ava in the East Indies. 1886 Proc. Amer. Philos. Soc. 23 31 Aqua regia dissolves some of the grains very slowly... Other grains are hardly acted upon and are probably iridium or platin-iridium. 1935 A. H. G. Palmer & K. S. Snell Mechanics ii. 14 The International Metre..is the distance between two lines on a bar of platiniridium kept at Sèvres. 1981 Technol. & Culture 22 146 The presence of inclusions of platiniridium in objects of gold from the Royal Cemetery at Ur suggested the use of gold from the distant Pactolus River in western Anatolia. 1992 Amer. Mineralogist 77 213/2 The consequence of the redefinition of the mineral names applicable to the Ru-Os-Ir ternary system..is that..platiniridium is merely platinum iridium. This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < n.1848
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