2016年12月
Dissolution of the chrysotile structure in nitric-acid solutions at different pH
CLAY MINERALS
- 巻
- 51
- 号
- 5
- 開始ページ
- 715
- 終了ページ
- 722
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1180/claymin.2016.051.5.02
- 出版者・発行元
- MINERALOGICAL SOC
The nitric-acid dissolution of chrysotile was investigated with the aim of revealing the effect of pH on its structure. Chrysotile becomes more soluble at lower pH, with the octahedral, brucite sheet more readily dissolved than the tetrahedral sheet. The dissolution of the brucite sheet increases the pH of the solvent, because of the release of OH-groups along with the Mg2+ ions. At pH 2.00, the characteristic cylindrical fibre bundle structure of chrysotile is retained after dissolution, although the outside surface of each fibre becomes rough. Chrysotile remains fibrous upon dissolution at pH 1.08, but the fibres are no longer crystalline and their cylindrical structure collapses. The nitric-acid treatments result in an increase in both the specific surface area and the pore volume of chrysotile.
- リンク情報
- ID情報
-
- DOI : 10.1180/claymin.2016.051.5.02
- ISSN : 0009-8558
- eISSN : 1471-8030
- Web of Science ID : WOS:000400028500002