Therapies involving the use of peloids (muds or poultices).
Cf., active principle, aesthetic medicine, antibacterial clay, geotherapy, healing clay, medicinal clay, peloid
Therapies involving the use of peloids (muds or poultices).
Cf., active principle, aesthetic medicine, antibacterial clay, geotherapy, healing clay, medicinal clay, peloid
The Mn-rich trioctahedral member of the chlorite group.
See chlorite
An obsolete varietal term for clinochlore.
A discredited trioctahedral Mg- and Si-rich chlorite, now referred to as clinochlore.
See chlorite
a) The formation of a stable dispersion of colloidal particles in water, usually by chemical additives;
b) In bentonite clay-product manufacturing, the use of chemical additives to improve the performance characteristics of the clay for a particular end use.
Cf., peptized clay.
A clay to which chemicals have been added to improve the performance characteristics of the clay for a specific end use.
Cf., peptize
As applied to clay science, percutaneous migration refers to the diffusion of elements from clay poultices (peloids) through the skin.
Replacement of a reactant mineral by a product mineral beginning at the outermost margin of the reactant mineral’s grain or fracture-bounded remnants.
See centripetal replacement.
An obsolete term for margarite.
Hydrated volcanic glass containing 2-5 wt. % H2O. Because of their high viscosity, rhyolitic melts form glasses upon cooling. Devitrification produces a “perlitic structure”, which is characterized by concentric cracks. Perlite has a pearly luster, and is glassy gray to black. When heated, H2O is released and glass shards dehydrate and expand to volumes to 20 times their original size. Associated zeolites are common. Perlite, after heating, is used as aggregate, fillers, in plaster products and in light-weight concrete, as coatings for steel beams as fire protection to reduce the possibility of melting or partial melting, etc.