|
|
Mineral
|
Composition
|
Pe
|
|---|---|---|---|
| Clay | Kaolinite | Al4[Si4O10](OH)8 | 1.49 |
|
|
Illite | KAl4[Si7AlO20](OH)4 | 2.05 |
|
|
Chlorite | Mg12[(Si, Al)8O20](OH)16 | 1.40 |
|
|
Quartz | SiO2 | 1.81 |
|
|
Chlorite | Mg12[(Si, Al)8O20](OH)16 | 1.40 |
|
|
Spinel | MgAl2O4 | 1.49 |
|
|
Serpentine | Mg3[Si2O5](OH)4 | 1.40 |
|
|
Biotite | K2Mg6[Si6Al2O20](OH)4 | 2.30 |
|
|
Calcite | CaCO3 | 5.08 |
| Amphibole | Pargasite | NaCa2Mg4Al3Si6O22(OH)2 | 2.55 |
|
|
Tremolite | Ca2Mg5Si8O22(OH)2 | 2.62 |
|
|
Hornblende | Ca2Fe+35[Si6Al2O22](OH)2 | 10.49 |
| Fe-Ti oxide | Ilmenite | Fe+2Ti+4O3 | 16.63 |
|
|
Hematite | Fe2O3 | 21.48 |
|
|
Magnetite | Fe+2Fe+32O4 | 22.24 |
| Olivine | Forsterite | Mg2SiO4 | 1.54 |
|
|
Fayalite | Fe2SiO4 | 17.17 |
| Pyroxene | Orthopyroxene | MgSiO3 | 1.84 |
|
|
Clinopyroxene | CaMgSi2O6 | 3.53 |
|
|
Augite | Mg2(SiAl)2O6 | 4.69 |
|
|
Orthoferrosilite | FeSiO3 | 13.57 |
| Feldspar | Albite | NaAlSi3O8 | 1.68 |
|
|
Anorthite | CaAl2Si2O8 | 3.13 |
| Pe = (Ze/10)3.6 |
|
||
Pe = ( AiZiPi)/( AiZi) |
|
||
Notes: Ai = number of each atom in the molecule. Zi = atomic number for each element. Pe = photoelectric cross-section index.