An obsolete term for margarite.

A crystalline sedimentary rock mainly composed of CaCO₃. Common minor constituents include quartz, feldspars and clay minerals. Limestone is heated to make clinker which is an additive to make Portland cement.
Cf., clinker, Portland cement

A line defect involves a series of structural imperfections that produces a linear feature and, commonly, offsets or “dislocations”, within an atomic structure. An “edge dislocation” forms where a plane of atoms or ions that would normally extend throughout the crystal terminates along a line within the crystal. Distortions are at a maximum along the line of termination. A “screw dislocation” is a localized screw axis involving atoms or ions (or blocks of atoms or ions) to form a spiral, much like a spiral staircase, with a step at the outer surface of the crystal. Because the screw dislocation is a local feature, the screw axis is not related to the space group (overall symmetry) of the structure, and the crystal regains its overall atomic periodicity at distances further from the central line of the dislocation. The step at the surface of the crystal is believed to enhance crystal growth because atoms or ions can better adhere and bond to sites associated with greater surface area at the step.
Cf., point defect, screw axis

The maximum capacity that a fine-grained, porous, granular material can absorb a liquid into the pore structure of the individual grains and still remain free-flowing. The point where the liquid impregnated granules adhere to the sides of a container (i.e. become “wetted”) represents a rough measure of internal liquid holding capacity of the material (i.e., the point beyond where granules begin adhering together and lose free-flowing properties).

One of the Atterberg Limits tests. The water content of a fine-grained soil/water mixture that defines the boundary between the liquid and plastic states for that soil, as defined by the test method described in ASTM Standard D4318 – 05.
See Mitchell (1993).
See also activity, Atterberg Limits, consistency number, plastic limit, plasticity index, shrinkage limit.

(water content – plastic limit) ÷ index of plasticity, or: (w – w_p) ÷ (w_l – w_p).
See also Atterberg Limits, plastic limit.

A term describing the lower limit where only a liquid phase exists in a phase diagram.
Cf. Phase diagram, solidus

An obsolete term for lepidolite, zinnwaldite.

An obsolete term for zinnwaldite.

An obsolete term for lepidolite.