The study of the deformation and flow of materials. For clay scientists, this may involve the study of the plasticity (i.e., creep, rupture) of clay, clay-water interactions, clay suspensions and interparticle forces, the electrical double layer, etc.
A property of a non-Newtonian fluid where the viscosity of the fluid increases with time at constant shear rates and shows a reduction in viscosity over time if not agitated (e.g., stirred).
Cf., Newtonian fluid, quick clay, thixotropy
See pyroxenoid group.
An obsolete varietal term for phlogopite, biotite.
An obsolete varietal term for phlogopite, biotite.
An obsolete varietal term for a banded form of green serpentine.
A discredited name for allophane from Gräfental, Thuringia, Germany.
A discredited name for an iron-rich, Si-poor chlorite.
See chlorite
See tobermorite.
The structure of romanechite, (Ba,H2O)2(Mn4+,Mn3+)5O10, forms large, rectangular-shaped tunnels bounded by double- and triple-chains of edge sharing MnO6 octahedra. The Mn3+ cations are located in the octahedra at the edges of the triple chains, and the Ba and H2O are located in the tunnels, often in a ratio of 1 to 2. Romanechite occurs in oxidized zones in Mn-rich ore deposits.