铑单晶
铑单晶 45Rh102.905
说明:铑是一种罕见的,有光泽,银白色的硬金属,属于白金族金属。它不受空气和875K水的影响,不溶于酸,溶于熔融碱。被用于催化剂。
铑单晶性能参数
状态: |
单晶 |
|
晶体结构: |
fcc |
|
生产方法: |
Floating Zone |
|
标准尺寸: |
diameter 6-10mm thickness 1-2mm |
|
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 |
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表面粗糙度: |
<0.03μm |
|
典型分析: |
99.99% |
|
典型分析(ppm): |
Ag < 0.10 Al 2.00 Au 0.90 C 15.0 Cl 3.00 Co 0.20 Cr 2.50 Cu 0.40 Fe 15.0 H < 1.00 Mg 0.03 Mn 1.00 |
Mo 2.00 N < 5.00 Na 0.20 Ni < 1.00 Pt 10.0 O 6.00 Si 10.0 Ti 1.00 Ta 0.30 V 0.20 W 10.0 Zr 2.00 Rh balance |
其他性能参数
晶体结构: |
(cell dimensions/pm), space group f.c.c. (a=380.36), Fm3m |
X射线衍射质量吸收系数: |
CuKa 194 (μ/r) / cm2g-1 MoKa 22.6 (μ/r) / cm2g-1 |
中子散射距离: |
0.588 b/10-12 cm |
热中子捕获横截面: |
144.8 sa / barns |
密度: |
12.4 g/cm3 |
熔点: |
1965.85 °C / 2239 °K |
沸点: |
3726.85 °C / 4000 °K |
摩尔体积: |
8.29 cm3 |
导热系数: |
150 [300 K] Wm-1K-1 |
热膨胀线系数: |
8.40 x 10-6 K-1 |
电阻系数: |
4.51x10-8 [293 K] Wm |
聚磁敏感性: |
+1.36 x 10-8(s) kg-1m3 |
杨氏模量: |
379 GPa |
刚性模量: |
147 GPa |
体积模量: |
276 GPa |
泊松比: |
0.26 GPa |
半径: |
Rh4+ 67; Rh3+ 75; Rh2+ 86; atomic 134; covalent 125 |
负电性: |
2.28 (Pauling); 1.45 (Allred); 4.30 eV (absolute) |
有效核电荷: |
3.90 (Slater); 7.64 (Clementi); 10.85 (Froese-Fischer) |
同位素: |
34 |
同位素质量范围: |
94m -> 112 |
生物资料
生物类别: |
none |
毒性 |
|
毒性摄取量: |
most rhodium compounds are slightly toxic by ingestion. |
致命摄取量: |
LD50 (RhCl3, ortal, rat)= 12.6 mg kg-1 |
危险性: |
There are few reported cases of humans being affected by rhodium, but it is an experimental carcinogen. |
人体等级 |
|
器官: |
n.a.n but very low |
每日食物摄取量: |
n.a. |
70kg成人平均总元素含量: |
n.a. |
地质资料
矿物: |
Rhodium occurs as rare deposits of the native metal and even rarer minerals. |
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矿物化学式 |
公式 |
密度 |
硬度 |
晶体外观 |
Rhodium |
Rh |
c. 12 |
3.5 |
cub., met. white |
Rhodplumsite |
Ph3Pb2S2 |
9.74 |
n.a. |
rhom., met. cream-pink/grey-blue |
主要矿石: |
native rhodium is found in Montana, USA; certain copper and nickel ores contain up to 0.1% rhodium and these are the main source of the element. |
世界产量: |
3 tonnes/year |
主要矿区: |
see copper and nickel |
储量: |
n.a. |
样品: |
available as foil, sponge or wire. Safe. |
总含量 |
|
太阳: |
25.1 (relative to H = 1 x 1012) |
地壳: |
2 x 10-4 p.p.m. |
海水: |
n.a., but minute |