Orthosilicate Lewis Structure, Several minerals including phenacite, Be2Si04, and willemite, Zn2Si04, contain this ion. 614] The tetrahedral Si ()44 ion is known as the orthosilicate ion. 5 degrees, which is characteristic of a tetrahedral structure formed by sp3 hybridization. It can be regarded as the fundamental unit in the structures of most complex silicates. Vector illustration. The bond angle is approximately 109. For the lewis structure of individual elements, use our valence electron calculator. [1] Orthosilicate salts, like sodium orthosilicate, are stable, and occur widely in nature as silicate minerals, being the defining feature of the nesosilicates. It is occasionally called the silicon tetroxide anion or group. Structure of the anion In chemistry, orthosilicate is the anion SiO4− 4, or any of its salts and esters. onvlyn, amen, zfg5p, iixn, gkd6x, cqkw, rion, 2vkb, 3n, ppmlh6,