จากวิกิพีเดีย สารานุกรมเสรี
[แก้] ความแข็งโมห์ (Mohs hardness)
[แก้] Vickers hardness
| number |
symbol |
name |
Vickers hardness/(MN/m²) |
| 4 |
Be |
beryllium |
1670 |
| 5 |
B |
boron |
49000 |
| 13 |
Al |
aluminium |
167 |
| 22 |
Ti |
titanium |
970 |
| 23 |
V |
vanadium |
628 |
| 24 |
Cr |
chromium |
1060 |
| 26 |
Fe |
iron |
608 |
| 27 |
Co |
cobalt |
1043 |
| 28 |
Ni |
nickel |
638 |
| 29 |
Cu |
copper |
369 |
| 40 |
Zr |
zirconium |
903 |
| 41 |
Nb |
niobium |
1320 |
| 42 |
Mo |
molybdenum |
1530 |
| 45 |
Rh |
rhodium |
1246 |
| 46 |
Pd |
palladium |
461 |
| 47 |
Ag |
silver |
251 |
| 57 |
La |
lanthanum |
491 |
| 58 |
Ce |
cerium |
270 |
| 59 |
Pr |
praseodymium |
400 |
| 60 |
Nd |
neodymium |
343 |
| 62 |
Sm |
samarium |
412 |
| 63 |
Eu |
europium |
167 |
| 64 |
Gd |
gadolinium |
570 |
| 65 |
Tb |
terbium |
863 |
| 66 |
Dy |
dysprosium |
540 |
| 67 |
Ho |
holmium |
481 |
| 68 |
Er |
erbium |
589 |
| 69 |
Tm |
thulium |
520 |
| 70 |
Yb |
ytterbium |
206 |
| 71 |
Lu |
lutetium |
1160 |
| 72 |
Hf |
hafnium |
1760 |
| 73 |
Ta |
tantalum |
873 |
| 74 |
W |
tungsten |
3430 |
| 75 |
Re |
rhenium |
2450 |
| 77 |
Ir |
iridium |
1760 |
| 78 |
Pt |
platinum |
549 |
| 79 |
Au |
gold |
216 |
| 90 |
Th |
thorium |
350 |
| 92 |
U |
uranium |
1960 |
[แก้] Brinell hardness
| number |
symbol |
name |
Brinell hardness/(MN/m²) |
| 4 |
Be |
beryllium |
600 |
| 11 |
Na |
sodium |
0.69 |
| 12 |
Mg |
magnesium |
260 |
| 13 |
Al |
aluminium |
245 |
| 19 |
K |
potassium |
0.363 |
| 20 |
Ca |
calcium |
167 |
| 21 |
Sc |
scandium |
750 |
| 22 |
Ti |
titanium |
716 |
| 23 |
V |
vanadium |
628 |
| 24 |
Cr |
chromium |
1120 |
| 25 |
Mn |
manganese |
196 |
| 26 |
Fe |
iron |
490 |
| 27 |
Co |
cobalt |
700 |
| 28 |
Ni |
nickel |
700 |
| 29 |
Cu |
copper |
874 |
| 30 |
Zn |
zinc |
412 |
| 31 |
Ga |
gallium |
60 |
| 33 |
As |
arsenic |
1440 |
| 34 |
Se |
selenium |
736 |
| 37 |
Rb |
rubidium |
0.216 |
| 39 |
Y |
yttrium |
589 |
| 40 |
Zr |
zirconium |
650 |
| 41 |
Nb |
niobium |
736 |
| 42 |
Mo |
molybdenum |
1500 |
| 44 |
Ru |
ruthenium |
2160 |
| 45 |
Rh |
rhodium |
1100 |
| 46 |
Pd |
palladium |
37.3 |
| 47 |
Ag |
silver |
24.5 |
| 48 |
Cd |
cadmium |
203 |
| 49 |
In |
indium |
8.83 |
| 50 |
Sn |
tin |
51 |
| 51 |
Sb |
antimony |
294 |
| 52 |
Te |
tellurium |
180 |
| 55 |
Cs |
caesium |
0.14 |
| 57 |
La |
lanthanum |
363 |
| 58 |
Ce |
cerium |
412 |
| 59 |
Pr |
praseodymium |
481 |
| 60 |
Nd |
neodymium |
265 |
| 62 |
Sm |
samarium |
441 |
| 65 |
Tb |
terbium |
677 |
| 66 |
Dy |
dysprosium |
500 |
| 67 |
Ho |
holmium |
746 |
| 68 |
Er |
erbium |
814 |
| 69 |
Tm |
thulium |
471 |
| 70 |
Yb |
ytterbium |
343 |
| 71 |
Lu |
lutetium |
893 |
| 72 |
Hf |
hafnium |
1700 |
| 73 |
Ta |
tantalum |
800 |
| 74 |
W |
tungsten |
2570 |
| 75 |
Re |
rhenium |
1320 |
| 76 |
Os |
osmium |
3920 |
| 77 |
Ir |
iridium |
1670 |
| 78 |
Pt |
platinum |
392 |
| 79 |
Au |
gold |
2450 |
| 81 |
Tl |
thallium |
26.4 |
| 82 |
Pb |
lead |
38.3 |
| 83 |
Bi |
bismuth |
94.2 |
| 90 |
Th |
thorium |
400 |
| 92 |
U |
uranium |
2400 |
[แก้] References
As quoted at http://www.webelements.com/ from this source:
- G.V. Samsonov (Ed.) in Handbook of the physicochemical properties of the elements, IFI-Plenum, New York, USA, 1968.