See zeolite.

Movement and removal of natural materials by the action of erosive agents, such as water, ice, and wind.
See weathering

An obsolete (light green) variety of parsettensite.

See equivalent spherical diameter; in statistics, this abbreviation is also used for estimated standard deviation.

A term broadly defined as a major element (e.g., H, O, C, N, Na, K, Ca, Mg, P, S, Cl) that plays physiologically important functions in human health. Essential elements can be derived through diet or through percutaneous migration from peloids.
See peloid
Cf., essential trace element;

A term for trace elements (e.g., Li, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, W, Mo, Si, Se, F, I, As, Br, Sn) required for human health and specific to the function of certain proteins and enzymes. An essential trace element may be derived through percutaneous migration or through diet.
Cf., trace element

See calcium silicate hydrate (CSH) in Part 1.

An obsolete term for biotite.

See crystal.

A poorly defined material, possibly altered biotite.