1 0 0 0 OA 石膏に關する最近の研究
1 0 0 0 OA 創立70周年を迎えて
1 0 0 0 OA カンラン石の合成と合成物の酸溶解性
- 著者
- 荒井 康夫 永井 彰一郎
- 出版者
- 無機マテリアル学会
- 雑誌
- 石膏と石灰 (ISSN:21854351)
- 巻号頁・発行日
- vol.1963, no.67, pp.245-252, 1963-11-01 (Released:2011-03-07)
- 参考文献数
- 3
Observation were made on the mechanism of formation of forsterite in MgO-SiO2 system reactions and the transformation of the crystal lattice of forsterite accompanying the displacement of Mg2+ in the lattice by Fe2+ of varing amount in order to scrutinize the course of formation of olivine, which is known as a component mineral of serpentine rock and various slags. It was confirmed by this study that Fe2+ dissolves at first when olivine is dissolved with an acid. This rapid dissolution of Fe2+ was attributed to the larger affinity of Fe2+ to an acid solution than Mg2+. 10 kinds of silicate minerals related with MgO-SiO2 system were then synthesized to study on the relation between the structure of silicate and its acid solubilities. It was concluded that the acid solubilities of CaO-SiO2 system is rather high because the polarization effect of Ca2+ is smaller than that of Mg2+ and that this acid solubility is more with CaO-MgO-SiO2 system, which has dissolved Mg2+, because the clearance in the structure is larger, and that the acid solubilities of silicates are dependent on the polymerization degree of silicate ions which constitute the silicate and, consequently, orthosilicates with island structure is most soluble.
