Here is a little table
| Element |
Nr |
SW |
MP |
E |
|
Potash
|
19 |
0,86 |
63,38° |
K |
| Magnesium |
12 |
1,74 |
650° |
Mg |
| Phosphorus |
15 |
1,82 |
589,5° |
P |
| Carbon |
6 |
2,27 |
3527° |
C |
| Silicon |
14 |
2,33 |
1410° |
Si |
| Aluminum |
13 |
2,70 |
660° |
Al |
| Titanium |
22 |
4,51 |
1668° |
Ti |
| Tin |
50 |
5,75 |
232° |
Sn |
| Antimony |
51 |
6,70 |
630,5° |
Sb |
| Chromium |
24 |
7,14 |
1907° |
Cr |
| Zinc |
30 |
7,14 |
419° |
Zn |
| Manganese |
25 |
7,21 |
1244° |
Mn |
| Iron |
26 |
7,87 |
1538° |
Fe |
| Niobium |
41 |
8,57 |
2470° |
Nb |
| Cadmium |
48 |
8,65 |
321° |
Cd |
| Copper |
29 |
8,89 |
1083° |
Cu |
| Cobalt |
27 |
8,90 |
1490° |
Co |
| Nickel |
28 |
8,90 |
1450° |
Ni |
| Molybdenum |
42 |
10,00 |
2500° |
Mo |
| Tantalum |
73 |
11,20 |
2996° |
Ta |
| Lead |
82 |
11,35 |
328° |
Pb |
| Mercury |
80 |
13,55 |
|
Hg |
Element=element name, Nr=Atomic number, MP=Melting Point in degrees Celcius, SW=Specific Weight in grams per cubic cm, E=Element.
I have sorted the table such that the lightes elements are on top. It would seem to me that you are right, the heaviest elemnts should be at the bottom. Ofcourse in general. Some other circumstances may have caused this to be otherwise but as a first guess this would be correct. Now the good thing is, nickel seems to be one of the heavier elements. Maybe more of it with increasing depth?
Just quick thoughts, not being a geologist.
Good luck to everybody!
VB
