Geology Reference
In-Depth Information
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). - continued from
previous page.
Mineral
Formula
H
f
(kJmol
1
)
E
(GPa)
G
IC
(Jm
2
)
K
IC
(MPa
m
1=2
)
(Jm
2
)
Sphalerite
ZnS
-3,621.36
82.73
4.18
0.588
2.09
Metacinnabar
-HgS
-3,551.49
48.51
2.316
0.335
1.158
Greenockite
CdS
-3,385.35
46.61
2.289
0.327
1.145
Wurtzite
ZnS
-3,611.53
86.85
4.536
0.628
2.268
Pyrite
FeS
2
-3,063.90
296.05
6.143
1.349
3.072
Halite
NaCl
-786.51
36.87
1.155
0.206
0.577
Sylvite
KCl
-716.74
24.09
0.758
0.135
0.379
Cesium chloride CsCl
-667.29
25.4
0.676
0.131
0.338
Fluorite
CaF
2
-2,641.76
109.26
3.179
0.589
1.589
Barite
BaSO
4
-2,393.63
60.03
1.203
0.269
0.602
Anhydrite
CaSO
4
-2,619.54
74.36
1.805
0.366
0.902
Nepheline
NaAlSiO
4
-9,654.40
76.01
6.412
0.698
3.206
Cobalt olivine
Co
2
SiO
4
-8,557.23
163.48
4.57
0.864
2.285
Liebenbergite
Ni
2
SiO
4
-8,721.64
205.37
5.45
1.058
2.725
Fayalite
Fe
2
SiO
4
-8,448.30
135.94
3.924
0.73
1.962
Monticellite
CaMgSiO
4
-7,988.42
141.58
4.665
0.813
2.332
Forsterite
Mg
2
SiO
4
-8,337.33
201.39
6.329
1.129
3.164
Wadsleyite
Mg
2
SiO
4
-8,302.39
278.07
6.792
1.374
3.396
Ringwoodite
Mg
2
SiO
4
-8,293.60
292.12
6.685
1.397
3.343
Andalusite
Al
2
SiO
5
-15,993.21
246.54
10.13
1.58
5.065
Anorthite
CaAl
2
Si
2
O
8
-20,069.79
103.28
5.478
0.752
2.739
Grossularite
Ca
3
Al
2
Si
3
O
12
-27,776.06
263.35
7.356
1.392
3.678
Pyrope
Mg
3
Al
2
Si
3
O
12
-28,689.34
232.08
7.348
1.306
3.674
Almandine
Fe
3
Al
2
Si
3
O
12
-28,886.43
241.73
7.102
1.31
3.551
Andradite
Ca
3
Fe2Si
3
O
12
-27,371.19
219.04
7.154
1.252
3.577
End of the table
Table D.3: Values of H
f
, E, grain boundary G
IC
and K
IC
, and for selected
minerals at 298 K, according to Tromans and Meech (2004)
Mineral
Formula
H
f
(kJmol
1
)
E
(GPa)
G
IC
(Jm
2
)
K
IC
(MPa
m
1=2
)
(Jm
2
)
Graphite-2H
C
-716.68
274.84
5.5052
1.23
2.7526
Diamond
C
-714.786
1099.6
9.9503
3.308
4.9751
Moissanite-6H
SiC
-1238.585
454.54
4.8
1.477
2.4
Moissanite-3C
SiC
-1239.903
436.2
4.7654
1.442
2.3827
Nierite
Si
3
N
4
-4069.62
306
2.8946
0.941
1.4473
Cubic Si
3
N
4
Si
3
N
4
-4028.52
379
3.4193
1.138
1.7096
Borazone
BN
-1288.178
909.05
8.2631
2.741
4.1315
Boron carbide
B
4
C
-3038.676
456
5.7
1.612
2.85
Molybdenite-2H
MoS
2
-1488.123
113.43
3.2294
0.605
1.6147
-Quartz
SiO
2
-1859.05
95.5
5.356
0.715
2.678
-Quartz (873 K)
SiO
2
-1859
99.76
3.6427
0.603
1.8214
-Cristobalite
SiO
2
-1855.253
65.17
7.7428
0.71
3.8714
Stishovite
SiO
2
-1809.67
536.16
4.8191
1.607
2.4096
Continued on next page :::
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