Chemistry Reference
In-Depth Information
Table 3.11
Representative hyperfine parameters at RT for some olivines
Mineral
Formula
Fe site
d
Fe
mm/s
D (mm/s)
(Fe
2+
)
2
SiO
4
Fe
2+
Fayalite
M1,M2
1.17
2.81
(Fe
2+
,Mg,Mn)
2
SiO
4
Fe
2+
Fayalite-forsterite-tephroite
M1,M2
1.16-1.18
2.80-3.02
(Fe
2+
,Fe
3+
,)
2
SiO
4
Fe
2+
Laihunite
M1
1.13-1.16
2.75-2.83
Fe
3+
M2
0.37-0.43
0.85-0.91
Table 3.12
Representative hyperfine parameters at RT for some garnets
Mineral
Formula
T (K)
Fe site
d
Fe
(mm/s)
D (mm/s)
(Fe
2+
)
3
Al
2
(SiO
4
)
3
Fe
2+
Almandine
RT
dodec
1.28
3.51
77
1.43
3.66
(Mg,Fe
2+
)
3
Al
2
(SiO
4
)
3
Fe
2+
Pyrope-almandine
RT
dodec
1.20-1.30
3.47-3.70
77
1.33-1.44
3.47-3.70
(Mn,Fe
2+
)
3
Al
2
(SiO
4
)
3
Fe
2+
Spessartine
RT
dodec
1.28
3.52
77
1.42
3.64
Ca
3
(Al,Fe
3+
)
2
(SiO
4
)
3
Fe
3+
Andradite
RT
oct
0.41
0.5-0.6
77
0.50
0.5-0.6
(Ca,Fe
2+
)
3
(Al,Fe
3+
)
2
(SiO
4
)
3
Fe
2+
Almandine-grossular
RT
dodec
1.20-1.30
3.47-3.70
Fe
3+
77
oct
0.35-0.45
0.29-0.75
Fe
2+
dodec
1.33-1.44
3.47-3.70
Fe
3+
oct
0.42-0.52
0.26-0.64
Ca
3
(Fe
3+
,Ti,Si)
2
(SiO
4
)
3
Fe
3+
Titano-andratite
RT
tetr
0.20
1.15
Fe
3+
77
oct
0.40
0.75
1.15
Fe
3+
tetr
0.30
Fe
3+
oct
0.50
0.75
Table 3.13
Representative hyperfine parameters at RT for some other nesosilicates
Mineral
Formula
Fe site
d
Fe
(mm/s)
D (mm/s)
Ca
2
(Fe
3+
,Al)
3
O(OH)(Si
2
O
7
)(SiO
4
)
Fe
3+
Epidote
M3
0.34-0.36
1.9-2.1
Ca
2
(Fe
3+
,Mn,Al)
3
O(OH)(Si
2
O
7
)(SiO
4
)
Fe
3+
Piemontite
M3
0.34-0.36
2.05-2.10
Fe
3+
M1
0.29-0.33
0.9-1.1
(Ca,RE)
2
(Fe
3+
,Al)
3
O(OH)(Si
2
O
7
)(SiO
4
)
3+
Allanite
M3
0.37
1.97
Fe
3+
M1
0.29
1.33
Fe
2+
M3
1.07
1.66
Fe
2+
M1
1.24
1.93
Fe
2+
Staurolite
(Fe,Mg,Zn)
2
Al
9
(Si,Al)
4
O
20
(OH)
4
tetr
0.98 (av)
2.45 (av)
Fe
2+
tetr
0.98 (av)
2.10 (av)
Fe
2+
tetr
0.97 (av)
1.6 (av)
Fe
3+
tetr
0.15 (av)
0.7 (av)
