Physical and mechanical properties for the platinum group of metals in the Periodic Table of Elements.

Platinum
Iridium
Osmium
Palladium
Rhodium
Ruthenium
Gold
Silver
Chemical Symbols
Pt
Ir
Os
Pd
Rh
Ru
Au
Ag
Atomic Number
78
77
76
46
45
44
79
47
Atomic Weight
195.09
192.22
190.2
106.4
102.9055
101.07
196.967
107.87
Crystal Structure*
FCC
FCC
HCP
FCC
FCC
HCP
FCC
FCC
Density g/cm3
21.45
22.65
22.61
12.02
12.41
12.45
19.3
10.5
Melting Point C
1769
2443
3050
1554
1960
2310
1064.43
961.93
Vickers Hardness (annealed)
41
220
-------
41
101
-------
20
26
Electrical Resistivity at 0 C microohm.cm
9.85
4.71
8.12
9.93
4.33
6.80
2.4
1.6
Thermal Conductivity Watts/meter/C
73
148
87
76
150
105
293
419
Tensile Strength (annealed) tons per square inch
9
71
-------
11
45
36
7
9
*FCC - face-centred cubic, HCP - hexagonal close-packed