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The silicate minerals are rock-forming minerals, constituting approximately 90 percent of the crust of the Earth. They are classified based on the structure of their silicate group which contain different ratios of silicon and oxygen. They make up the largest and most important class of rock-forming minerals. ==Nesosilicates or orthosilicates== Nesosilicates (from Greek νησος ''nēsos'', island), or orthosilicates, have the orthosilicate ion, which constitute isolated (insular) ()4− tetrahedra that are connected only by interstitial cations. Nickel-Strunz classification: 09.A *Phenakite group * *Phenakite - Be2SiO4 * *Willemite - Zn2SiO4 *Olivine group * *Forsterite - Mg2SiO4 * *Fayalite - Fe2SiO4 * *Tephroite - Mn2SiO4 *Garnet group * *Pyrope - Mg3Al2(SiO4)3 * *Almandine - Fe3Al2(SiO4)3 * *Spessartine - Mn3Al2(SiO4)3 * *Grossular - Ca3Al2(SiO4)3 * *Andradite - Ca3Fe2(SiO4)3 * *Uvarovite - Ca3Cr2(SiO4)3 * *Hydrogrossular - Ca3Al2Si2O8(SiO4)3-m(OH)4m *Zircon group * *Zircon - ZrSiO4 * *Thorite - (Th,U)SiO4 *Al2SiO5 group * *Andalusite - Al2SiO5 * *Kyanite - Al2SiO5 * *Sillimanite - Al2SiO5 * *Dumortierite - Al6.5-7BO3(SiO4)3(O,OH)3 * *Topaz - Al2SiO4(F,OH)2 * *Staurolite - Fe2Al9(SiO4)4(O,OH)2 *Humite group - (Mg,Fe)7(SiO4)3(F,OH)2 * *Norbergite - Mg3(SiO4)(F,OH)2 * *Chondrodite - Mg5(SiO4)2(F,OH)2 * *Humite - Mg7(SiO4)3(F,OH)2 * *Clinohumite - Mg9(SiO4)4(F,OH)2 *Datolite - CaBSiO4(OH) *Titanite - CaTiSiO5 *Chloritoid - (Fe,Mg,Mn)2Al4Si2O10(OH)4 *Mullite (aka Porcelainite) - Al6Si2O13 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Silicate minerals」の詳細全文を読む スポンサード リンク
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