铱单晶
铱单晶 77Ir192.2
说明: 铱是一种具有银色光泽的硬金属,是所谓的铂组金属。它不与空气,水和酸等反应,但是溶于碱熔盐中。铱被用于特殊合金和火花塞中。
铱单晶性能参数
状态: |
单晶 |
|
晶体结构: |
fcc |
|
生产方法: |
Floating zone |
|
标准尺寸: |
diameter 8-10mm thickness 1-2 |
|
晶向: |
(100), (110) and (111) |
|
晶向精度: |
<2°, <1°, <0.5° or <0.1° |
|
纯度: |
as cut, one or two sides polished |
|
表面粗糙度: |
<0.03μm |
|
典型分析: |
99.99% |
|
典型分析(ppm): |
Ag 0.50 Al 8,00 Au < 0,10 C 12,00 Ca 2,00 Co 4,00 Cu 0.60 Cr 2,00 Fe 9,00 |
Ni 0,50 O 8,00 Pb 2,00 Pt 10,00 Rh 15,00 Si 5,00 Ti 7,00 W 10,00 Ir balance |
其他性能参数
晶体结构: |
(cell dimensions/pm), space group f.c.c. (a=383.92). Fm3m |
X射线衍射质量吸收系数: |
CuKa 193 (μ/r) / cm2g-1 MoKa 110 (μ/r) / cm2g-1 |
中子散射距离: |
1.06 b/10-12 cm |
热中子捕获横截面: |
425 sa / barns |
密度: |
22.5 g/cm3 |
熔点: |
2409.85 °C / 2683 °K |
沸点: |
4129.85 °C / 4403 °K |
摩尔体积: |
8.57 cm3 |
导热系数: |
147 [300 K] Wm-1K-1 |
热膨胀线系数: |
6.4 x 10-6 K-1 |
电阻系数: |
5.3x10-8 [293 K] Wm |
聚磁敏感性: |
+1.67 x 10-9(s) kg-1m3 |
杨氏模量: |
528 GPa |
刚性模量: |
209 GPa |
体积模量: |
371 GPa |
泊松比: |
0.26 GPa |
半径: |
Ir4+ 66; Ir3+ 75; Ir2+ 89; atomic 136; covalent 126 |
负电性: |
2.20 (Pauling); 1.55 (Allred); 5.4 eV (absolute) |
有效核电荷: |
3.90 (Slater); 10.57 (Clementi); 15.33 (Froese-Fischer) |
同位素: |
40 |
同位素质量范围: |
170 -> 198 |
生物资料
生物类别: |
none |
毒性 |
|
毒性摄取量: |
the pure metal is clinically inet; data on compounds is sparse. |
致命摄取量: |
LD50 (chloride, oral, mouse) = 8.12 mg kg-1 |
危险性: |
Indium chloride is moderately toxic by ingestion, but most compunds are insoluble and not absorbed by the body. |
人体等级 |
|
血液: |
n.a., but very low |
骨骼: |
n.a. |
肝脏: |
n.a. |
肌肉: |
c. 2 x 10-5 p.p.m. |
每日食物摄取量: |
n.a., but very low |
70kg成人平均总元素含量: |
n.a. |
地质资料
矿物: |
|
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矿物化学式 |
公式 |
密度 |
硬度 |
晶体外观 |
Iridium |
IR |
22.4 |
6 - 6.5 |
cub., met. white |
Iridosmine |
(Os, Ir) |
20 |
6 - 7 |
hex., met. white/grey |
Osmiridium |
(Ir, Os) |
20 |
6 - 7 |
cub., met. white |
主要矿石: |
osmiridium; also found with platinum ores |
世界产量: |
3 tonnes/year |
主要矿区: |
Canada for native element; see also platinum. |
储量: |
n.a. |
样品: |
available as foil, powder, spronge or wire. Safe. |
总含量 |
|
太阳: |
7.1 (relative to H = 1 x 1012) |
地壳: |
3 x 10-6 p.p.m. |
海水: |
n.a., but very low |
停留时间: |
n.a. |