| Groups in this class include micas, kaolins, vermiculites, chlorites, talc, pyrophyllite, and smectites. |
| Our samples are not from the areas of pyrophyllite occurrences described by Kontak et al. |
| The wall rock was highly altered and consisted of a groundmass of pyrophyllite and fine-grained pyrite. |
| In many cases, quartz overgrowths were preferentially corroded and dissolved in the presence of pyrophyllite, most likely during acidic metasomatism. |
| Pyrophyllite, a hydrous aluminum silicate, is the basis for the new product, called Airblock. |
| Single brilliant, striated, cubic crystals to 2.5 cm on edge were found in soft greasy masses of pyrophyllite that was easily removed from the specimens. |
