A poorly defined material, possibly decomposed biotite.

Hemostatic wound dressings are used to control bleeding when tissue damage occurs. One active ingredient applied either directly or with gauze bandages to a wound is clay (commonly, kaolins, zeolites, and smectites), which is used to absorb fluid and to promote blood clotting.

A trioctahedral member of the true mica group. The end-member formula is KZn₃AlSi₃O₁₀(OH)₂. The Zn content must be greater than or equal to 1.5 for the specimen name to be valid. Reported polytypes are 1M, 2M₁, and 3T. It forms in skarns of Zn deposits and occurs at Franklin Furnace, New Jersey, U.S.A.

See hollandite.

Precipitation from solution of one solid phase on another.

A reaction that involves more than one physical state (i.e., solid, liquid, gas).
Cf., homogeneous reaction

An obsolete varietal term for biotite.

Expandable 2:1 clays (e.g. smectite, vermiculite) treated with solutions of the quaternary alkylammonium salt, hexadecyltrimethylammonium (HDTMA) bromide (also called cetyltrimethylammonium bromide), form organophilic-type organoclay. HDTMA organoclay can effectively remove organic contaminants, such as toluene, from water; see Boyd et al. (1988).
Cf., adsorptive organoclays, organoclay, organophilic-type organoclay

See crystal system.

A poorly defined material, possibly a mica.