1. X-ray diffraction, infrared and TGA/DTG analysis of hydrated nacrite;Amara;Clay Miner.,1997
2. Differential weathering of volcanic ash and pumice, resulting in formation of hydrated halloysite;Aomine;Am. Mineral.,1962
3. Kaolin minerals;Bailey,1980
4. Polytypism of 1:1 layer silicates;Bailey,1988
5. Halloysite—a critical assessment;Bailey;Sci. Geol. Mem.,1990