See:flucan
A rod used for cleaning drill holes before they are charged with
explosives. Fay
a. Corn. See:gouge clay
b. A crossvein composed of clay. Arkell
a. An artificial inclined channel used for conveying water for industrial
purposes, such as irrigation, transportation, mining, logging, or power
production; or for diverting the water of a stream from its channel for
the purpose of washing or dredging the sand and gravel in the dry bed or
to aid in engineering construction. AGI
b. An inclined channel, usually of wood and often supported on a trestle,
for conveying water from a distance to be utilized for power,
transportation, etc., as in placer mining, logging, etc. Syn:sluice;
race.
c. To divert by a flume, such as the waters of a stream, in order to lay
bare the auriferous sand and gravel forming the bed. CF:ditch
The transportation of solids by suspension or flotation in flowing water.
A smooth porcellanous rock resembling porridge in color and texture;
Carboniferous limestone, Hunts quarry, Porthywaen, and Vale of Clwyd,
north Wales. Also called flummery stone.
A compact mixture of fluorite and barytes. Hey, 1
A hexagonal mineral, Mg3 (BO3 )(F,OH)3 ; colorless;
occurs as fibrous masses of small prisms in skarns and veinlets in massive
franklinite ore at Sterling Hill, NJ; also at Norberg, Sweden; Nocera,
Italy; and Broadford, Scotland. Formerly called nocerite.
A hexagonal mineral, (Ce,La)F3 ; further speciated on the basis of
the dominant rare-earth element; weakly radioactive; in pegmatites
associated with gadolinite, allanite, and bastnaesite in the Front Ranges,
CO.
See:fluorimetry
a. The original spelling of fluorite; still used chiefly in Great Britain.
b. A prefix to mineral names indicating that some or all of the hydroxyl
radical in its composition has been replaced by fluoride; e.g., micas and
amphiboles. See also:fluorite; fluormica.
Artificial amphibole with fluorine replacing the hydroxyl of hydroxyl
amphibole. English
A hexagonal mineral, Ca5 (PO4 )3 F ; apatite group;
variably colored; commonly fluorescent or phosphorescent; defines 5 on the
Mohs hardness scale; a common accessory mineral in igneous and metamorphic
rocks, pegmatites, veins, and carbonate rocks; an ore of phosphate in
phosphorites. Syn:apatite
See:fluoramphibole
An organic compound formed through the burning of pyritous shale in
Bohemia, former Czechoslovakia. Later renamed kratochvilite.
Tomkeieff
a. The emission of visible light by a substance exposed to ultraviolet
light. It is a useful property in examining well cuttings for oil shows
and in prospecting for some minerals. AGI
b. The absorption of radiation at one wavelength, or a range of
wavelengths, and its reemission as radiation of longer, visible
wavelengths.
c. A type of luminescence in which the emission of light ceases when the
external stimulus ceases; also, the light so produced. AGI
d. Quantized electromagnetic radiation as a material drops from a higher
to a lower energy state. Fluorescence stops when the excitation energy
stops. CF:phosphorescence; luminescence.
Having the property to produce fluorescence. Long
a. Commonly and improperly designates an electric lamplike device emitting
ultraviolet radiations or black light. CF:black light, lamp
Long
b. A glass globe or tube, the inner surface of which is coated with a
fluorescent substance that produces visible light when excited by an
electric current. Long
fluorescent penetrant inspection
A type of nondestructive testing wherein a penetrating type of oil or
other liquid combined with fluorescent material particles is applied over
a surface and flowed into cracks, crevices, or other surface defects or
irregularities; the excess is then removed, and the article is examined
under ultraviolet light. Henderson
A variety of hectorite in which fluorine partially replaces hydroxyl.
CF:montmorillonite; smectite; saponite.
A mineral with fluorine as its chief anion.