Kaolinite synthesis at 25°C
The addition of quercetin, an organic flavone (C15H10O7), to aqueous solutions containing silica and aluminum and adjusted to final pH's from 6.5 to 8.5 produced a 1 : 1 alumninosilicate precipitate which, after 6 to 16 months of aging in solution at 25°C, contained as much as 5 percent well-formed kaolinite plates. Similar solutions containing no organic material produced relatively amorphous precipitates with the same composition and stability (standard free energy of formation = -897±1 kilocalories per mole) but with substantially smaller amounts of crystaline material even after 2 years of aging.
Citation Information
Publication Year | 1974 |
---|---|
Title | Kaolinite synthesis at 25°C |
DOI | 10.1126/science.184.4142.1171 |
Authors | J. D. Hem, Carol J. Lind |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Science |
Index ID | 70010916 |
Record Source | USGS Publications Warehouse |