a. Any chemical that is added to a system or a mixture to consume, or to
convert to an inactive form, small quantities of impurities or undesired
materials. CCD, 2
b. In flotation, a rougher cell in which the tailings, before being
rejected as waste, are subjected to a scavenging flotation treatment.
Concentrating tables are also used as scavenger machines. Hess
c. In metallurgical operations, an active metal added to combine with
oxygen and/or nitrogen in the molten metal and so cause removal of
impurities into slag. CCD, 2
d. Oxygen, iodine, or more complex materials that, when added to a
mixture, combine with free radicals in the mixture and permit the
measurement of these radicals. CCD, 2
Secondary cells for the retreatment of tailings. BS, 5
The removal of coal so close to the surface as to undermine the topsoil,
resulting in devastation above ground. Usually engaged in by an
independent operator working an old mine on a lease from a major
corporation. Korson
In mineral processing, final stage in flotation of mineralized froth
before discard of tailing. The cells are so worked as to remove for
retreatment as much low-grade rising mineral as possible under the given
working conditions. Pryor, 3
A monoclinic mineral, Ca7 Si6 (CO3 )O18 .2H
2 O ; forms bundles of thin, colorless, tabular crystals at Scawt
Hill, County Antrim, Ireland.
Quartz crystals resembling a scepter in shape.
A tetragonal mineral, FeSb2 O4 ; red to reddish-brown.
A trigonal mineral, Na21 (SO4 )7 F6 Cl ;
colorless; at Searles Lake, CA. CF:galeite
A trigonal mineral, (Mn,Fe)16 Si12 As3 O36
(OH)17 ; dimorphous with nelenite; reddish-brown.
An isometric mineral, AgBiS2 ; a high-temperature polymorph of
matildite and member of the halite group; not recognized as a valid
mineral species; occurs as acicular crystals, granular, or massive.
See also:matildite
Same as aphrite.
A tetragonal mineral, CaWO4 , with molybdenum replacing tungsten
toward powellite CaMoO4 ; prismatic cleavage; sp gr, 5.9 to 6.1;
varicolored, fluoresces bright blue; in limestone and pneumatolitic veins
near granite contacts, granite pegmatites; a source of tungsten.
A whitish, gray; yellow, green, or pale reddish; brittle; tasteless;
inodorous hydrocarbon; melts at 44 degrees C; soluble in alcohol and
ether; may be distilled without decomposition, boiling at 92 degrees C.
Syn:xylocryptite
A mineral, (Na,Ca)(Fe,Mn)Si2 O6 ; brown to black; a variety
of manganoan aegirine.
a. Fossil resin found in brown coal. Tomkeieff
b. A former name for phoenicochroite.
Showing principles of construction or operation, without accurate
mechanical representation. Nichols, 1
a. A very rare, weakly radioactive, orthorhombic(?), black mineral,
(Ca,Y,Sb,Mn)2 (Ti,Ta,Nb,W)2 O6 (O,OH) , found at
Torvelona, Norway, in pegmatite with plagioclase, tourmaline, bismuth,
euxenite, thortveitite, monazite, alvite, beryl, garnet, and magnetite.
Small amounts of uranium may be present. Crosby
b. A name for an incompletely described possible member of the betafite
subgroup of the pyrochlore group.
In this fan, the blades are mounted on the curved portion of a dish-shaped
rotor and are designed to impart dynamic energy but no pressure or static
energy to the air, the dynamic energy being converted to pressure in the
diffuser. The fan is suitable for water gauges up to 20 in (50.8 cm) and
there is an absence of noise. It is useful where the resistance of the
mine is known and not liable to alter materially. Sinclair, 1
A variety of calcite occurring in very thin plates or scales. Fay
A phenomenon related to sheen; an almost metallic iridescent shimmer or
play of color seen just below the surface in certain varieties of
pyroxene, feldspar, etc. Etymol: German. See also:adularescence;
schillerization.
Enstatite or bronzite peridotite with poikilitic pyroxenes. Orthorhombic
pyroxenes possess the poikilitic texture to a peculiar degree, and esp.
when more or less altered to bastite, the term schiller is esp. applied to
them. Fay