An obsolete term for illite.

See diaspore.

A poorly known, modulated 2:1 layer silicate (Guggenheim and Eggleton, 1987). Although superficially resembling chlorite, gonyerite has a two-layer structure with structurally different types of interstratified layers. Inverted tetrahedra occur between the 2:1 layer and linked to the what would be the brucite-like interlayer in an ideal chlorite. Samples of gonyerite are generally impure, although an analysis by Frondel (1955) reported an approximate composition of (Mn_3.25Mg_1.95Fe³⁺_0.64)(Si_3.75Fe³⁺_0.17Al_0.08)O_10.2(OH)_7.8 and is based on the assumption that gonyerite is a chlorite and all iron is ferric. Gonyerite occurs in low-grade metamorphic, silicate-rich manganese deposits, such as that at the Harstigen Mine, Pajsberg, Värmland, Sweden.

An obsolete term for nontronite.

A Monte Carlo molecular simulation that is based on the grand canonical thermodynamic ensemble, an ensemble (e.g., a system of particles) in statistical mechanics that describes the possible states of the particles in equilibrium. The model system properties of chemical potential, volume, and temperature are held constant, but the number of particles in the system (e.g., interlayer water molecules) is allowed to vary as equilibrium is achieved. In this context, equilibrium implies both potential energy and system density (number of particles). Monte Carlo moves are accepted based on the energy change of the move according to a Boltzmann probability (so that some moves resulting in higher energy are accepted).
Cf., force field, molecular dynamics, Monte Carlo molecular simulation

See garnet.

See b-fabric.

A green body is an unfired clay-based object, e.g., made from mixtures of milled clay, quartz, feldspar, and appropriate amounts of water, and formed by molding, pressing, or by a potter’s wheel. The green body is fired in kilns to obtain a ceramic object.
Syn., greenware;
Cf., ceramic, pottery

See green strength.

a) In clayware manufacture, the ability of an unfired, molded clay body to resist mechanical deformation.

b) In metal casting, a measure of the ability of a bentonite-bound sand mold to resist deformation (also called “green sand strength”).