An Experimental Study of the Formation of Talc through CaMg(CO3)2–SiO2–H2O Interaction at 100–200°C and Vapor-Saturation Pressures
Table 1
Fermi diad bands, splits, and peak areas of CO2 generated in the FSCC containing dolomite and water at 200°C, and the calculated degree of reaction.
Reaction time (h)
Fermi diads and splits (cm−1)
Peak area
Degree of reaction
0
—
—
—
0
0
0
0
2
1285.21
1387.92
102.71
315.87
366.62
682.49
15.8
4
1285.19
1387.77
102.58
530.83
775.21
1306.04
30.2
6
1285.09
1387.7
102.61
551.64
817.14
1368.78
31.6
8
1285.14
1387.72
102.58
599.66
955
1554.66
35.9
10
1284.84
1387.49
102.65
731.41
1023.21
1754.62
40.6
20
1285.51
1388.04
102.53
900.65
1419.02
2319.67
53.6
22
1285.45
1388
102.55
1000.18
1483.36
2483.54
57.4
28
1285.37
1387.95
102.58
1155.19
1718.56
2873.75
66.4
40
1285.43
1387.98
102.55
1327.9
1910.84
3238.74
74.8
43
1285.66
1388.21
102.55
1270.99
1887.07
3158.06
73.0
46
1285.76
1388.23
102.47
1388.06
1995.8
3383.86
78.2
49
1285.63
1388.17
102.54
1346.42
1921.19
3267.61
75.5
60
1285.39
1387.94
102.55
1370.6
2163.74
3534.34
81.7
65
1285.62
1388.16
102.54
1433.07
2208.62
3641.69
84.2
70
1285.59
1388.14
102.55
1454.65
2172.31
3626.96
83.8
87
1285.01
1387.57
102.56
1561.79
2307.84
3869.63
89.4
92
1285.49
1387.93
102.44
1623.26
2288.82
3912.08
90.4
104
1285.73
1388.11
102.38
1713.6
2457.37
4170.97
96.4
137
1285.67
1388.04
102.37
1729.76
2589.05
4318.81
149
1285.26
1387.99
102.73
1746.57
2501.63
4248.2
159
1285.38
1387.97
102.59
1836.27
2553.95
4390.22
171
1285.31
1387.93
102.62
1797.81
2599.46
4397.27
193
1285.24
1387.77
102.53
1697.12
2681.04
4378.16
203
1285.37
1387.95
102.58
1755.2
2555.08
4310.28
213
1285.66
1388.21
102.55
1740.85
2548.89
4289.74
224
1285.6
1388.15
102.55
1725
2559.7
4284.7
total Raman peak area of CO2 at equilibrium state is an average of those after reaction for ~120 h. Then, the degree of reaction can be regarded as 100% when the reaction time exceeds 120 h.
