UNISILICATE

U′ni‐sil″i‐cate (?), n. [[Uni- + silicate.]] (Min.) A salt of orthosilicic acid, H4SiO4; — so called because the ratio of the oxygen atoms united to the basic metals and silicon respectively is 1:1; for example, Mg2SiO4 or 2MgO.SiO2.