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| 8/A | Nesosilicates, with [SiO4]4- groups, cations of tetrahedric orientation [4] |
| 8/AX | Unclassified nesosilicates |
| 8/B | Nesosubsilicates, with anions unfamiliar to tetraheders, cations of octahedral and tetrahedral orientation [4/6] |
| 8/C | Sorosilicates, with [Si2O7]6-, without anions unfamiliar to tetraheders |
| 8/CX | Unclassified sorosilicates |
| 8/D | Unclassified silicates, mostly cations of small size Mg, Fe, Mn, Cu |
| 8/DX | Unclassified silicates |
| 8/E | Cyclosilicates, triplet rings [Si3O9]6- |
| 8/EX | Unclassified cyclosilicates |
| 8/F | Inosilicates (chain and band) double chains [Si2O6]4- |
| 8/FX | Unclassified inosilicates |
| 8/G | Intermediate between chain- and layered silicates |
| 8/H | Phyllosilicates (layered), Tetragonal or pseudotetragonal layered structures [Si4O10]4- and others |
| 8/HX | Unclassified phyllosilicates |
| 8/J | Tectosilicates (network) without anions unfamiliar to the tetraheders |
| 8/JX | Unclassified tectosilicates |
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