Iridium

Iridium (Óa-im: "i-lí-ti-ùm") sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 77, hoà-ha̍k hû-hō sī Ir.

Iridium,  ₇₇Ir

Ki-pún sèng-chit
Miâ, hû-hō	iridium, Ir
Gōa-hêng	silvery white
Iridium tī chiu-kî-piáu lāi ê ūi-tì
Rh ↑ Ir ↓ Mt osmium ← iridium → pe̍h-kim
Goân-chú-hoan	77
Goân-chú-liōng (±)	192.217(3)
Goân-sò͘ lūi-pia̍t	kòe-tō͘ kim-sio̍k
Cho̍k, hun-khu	9 cho̍k, d khu
Chiu-kî	tē 6 chiu-kî
Tiān-chú pâi-lia̍t	[Xe] 4f14 5d7 6s2
per shell	2, 8, 18, 32, 15, 2
Bu̍t-lí sèng-chit
Siòng	solid
Iûⁿ-tiám	2719 K ​(2446 °C, ​4435 °F)
Hut-tiám	4403 K ​(4130 °C, ​7466 °F)
Bi̍t-tō͘  (sek-un)	22.56 g·cm−3
19 g·cm−3
Iûⁿ-hoà-jia̍t	41.12 kJ·mol−1
Cheng-hoat-jia̍t	564 kJ·mol−1
Jia̍t-iông-liōng	25.10 J·mol−1·K−1
cheng-khì-ap P (Pa) 1 10 100 1 k 10 k 100 k tī T (K) 2713 2957 3252 3614 4069 4659
Goân-chú sèng-chit
Sng-hòa-sò͘	−3, −1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Tiān-hū-tō͘	Pauling scale: 2.20
Tiān-lī-lêng	1st: 880 kJ·mol−1 2nd: 1600 kJ·mol−1
Goân-chú pòaⁿ-kèng	empirical: 136 pm
Kiōng-kè pòaⁿ-kèng	141±6 pm
Cha̍p-lio̍k
Chiⁿ-thé kò͘-chō	​face-centered cubic (fcc)
Siaⁿ-sok (sòe kùn-á)	4825 m·s−1 (at 20 °C)
Jia̍t-phòng-tiòng	6.4 µm·m−1·K−1
Jia̍t-thoân-tō-lu̍t	147 W·m−1·K−1
Tiān-chó͘-lu̍t	47.1 nΩ·m (at 20 °C)
Chû-sèng	paramagnetic
Young hē-sò͘	528 GPa
Shear hē-sò͘	210 GPa
Bulk hē-sò͘	320 GPa
Poisson pí	0.26
Mohs ngē-tō͘	6.5
Vickers ngē-tō͘	1760–2200 MPa
Brinell ngē-tō͘	1670 MPa
CAS teng-kì pian-hō	7439-88-5
Le̍k-sú
Discovery and first isolation	Smithson Tennant (1803)
Chòe ún-tēng ê tông-ūi-sò͘
Chú bûn-chiong: iridium ê tông-ūi-sò͘
iso NA half-life DM DE (MeV) DP 188Ir syn 1.73 d ε 1.64 188Os 189Ir syn 13.2 d ε 0.532 189Os 190Ir syn 11.8 d ε 2.000 190Os 191Ir 37.3% – (α) 2.0839 187Re 192Ir syn 73.827 d β− 1.460 192Pt ε 1.046 192Os 192m2Ir syn 241 y IT 0.161 192Ir 193Ir 62.7% – (α) 1.0173 189Re 193mIr syn 10.5 d IT 0.080 193Ir 194Ir syn 19.3 h β− 2.247 194Pt 194m2Ir syn 171 d IT – 194Ir
Decay modes in parentheses are predicted, but have not yet been observed