Geology Reference
In-Depth Information
Table D.1: Standard Electrode Potentials E
0
in Aqueous Solution at 25
o
C
(Lide, 2006). - continued from previous page.
E
0
(Volts)
Cathode (Reduction) Half-Reaction
2Hg
2+
(aq) + 2e
! Hg
2+
2
(aq)
0.9
NO
3
(aq) + 4H
+
(aq) + 3e
! NO(g) + 2H
2
O(l)
0.96
Br
2
(l) + 2e
! 2Br
(aq)
1.07
O
2
(g) + 4H
+
(aq) + 4e
! 2H
2
O(l)
1.23
Cr
2
O7
2
(aq) + 14H
+
(aq) + 6e
! 2Cr
3+
(aq) + 7H
2
O(l)
1.33
Cl
2
(g) + 2e
! 2Cl
(aq)
1.36
Ce
4+
(aq) + e
! Ce
3+
(aq)
1.44
MnO4
(aq) + 8H
+
(aq) + 5e
! Mn
2+
(aq) + 4H
2
O(l)
1.49
H
2
O
2
(aq) + 2H
+
(aq) + 2e
! 2H
2
O(l)
1.78
Co
3+
(aq) + e
! Co
2+
(aq)
1.82
S
2
O8
2
(aq) + 2e
! 2SO4
2
(aq)
2.01
O
3
(g) + 2H
+
(aq) + 2e
! O
2
(g) + H
2
O(l)
2.07
F
2
(g) + 2e
! 2F
(aq)
2.87
End of the table
D.2 Data required for calculating the comminution exergy
Table D.2: Values of H
f
, E, grain boundary G
IC
and K
IC
, and for selected
minerals at 298 K, according to Tromans and Meech (2002b)
Mineral
Formula
H
f
(kJmol
1
)
E
(GPa)
G
IC
(Jm
2
)
K
IC
(MPa
m
1=2
)
(Jm
2
)
Cuprite
Cu
2
O
-3,301.12
29.91
0.886
0.163
0.4428
Periclase
MgO
-3,915.74
307.18
13.704
2.052
6.852
Lime
CaO
-3,527.59
196.96
8.335
1.281
4.168
Barium oxide
BaO
-3,181.05
92.25
4.274
0.623
2.137
Wustite
FeO
-3,985.77
127.53
4.885
0.789
2.443
Cobalt oxide
CoO
-4,046.45
189.4
7.449
1.188
3.725
Nickel oxide
NiO
-4,136.21
232.46
9.964
1.522
4.982
Bromellite
BeO
-4,568.86
396.07
17.238
2.613
8.619
Zincite
ZnO
-4,124.53
126.74
5.599
0.842
2.799
Rutile
TiO
2
-12,491.16
285.1
18.445
2.293
9.223
Cassiterite
SnO
2
-11,769.59
262.49
14.845
1.974
7.423
Corundum
Al
2
O
3
-15,547.20
399.76
19.25
2.774
9.625
Hematite
Fe
2
O
3
-15,153.76
212.35
20.75
2.099
10.375
Eskolaite
Cr
2
O
3
-15,336.01
314.56
14.617
2.144
7.309
Titanium oxide
Ti
2
O
3
-15,279.20
244.45
12.269
1.732
6.135
Spinel
MgAl
2
O
4
-19,485.91
273.83
14.014
1.959
7.007
Hercynite
FeAl
2
O
4
-19,585.31
222.1
10.687
1.541
5.344
Chromite
FeCr
2
O
4
-19,372.94
268.65
12.209
1.811
6.104
Nickel chromite
NiCr
2
O
4
-19,474.37
106.62
3.08
0.573
1.54
Zinc ferrite
ZnFe
2
O
4
-19,275.17
241.16
11.42
1.66
5.71
Magnetite
Fe
3
O
4
-19,166.40
230.33
12.897
1.724
6.449
Chrysoberyl
BeAl
2
O
4
-20,133.21
389.79
18.624
2.694
9.312
Galena
PbS
-3,082.62
80.04
3.736
0.547
1.868
Continued on next page :::
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