Chemical analyses and 27Al and 29Si magic-angle-spinning NMR spectra are presented for four sepiolites and a palygorskite (attapulgite). The results show that at least three or four specific crystallographically non-equivalent tetrahedral sites exist in sepiolite and that at least two such sites exist in palygorskite. -R.A.H.
All Science Journal Classification (ASJC) codes
- Water Science and Technology
- Soil Science
- Geochemistry and Petrology
- Earth and Planetary Sciences (miscellaneous)