A form of vertical chute in which the chute is divided into independent
sections that can be raised or lowered on a track arrangement. It is
flexible and can be lowered to the bottom of the car, giving a solid
stream of coal from loading pocket to car. Mitchell
See:chevron fold
A wooden rule (generally 2 m or 6 ft long, folded zigzag fashion in 15-cm
or 6-in lengths), used by drillers, craftsmen, etc., to measure short
distances. The rule usually is graduated in centimeters or in feet,
inches, and fractions of an inch (sometimes in feet, tenths of a foot, and
hundredths of a foot). Long
A zigzag transformer is a transformer intended primarily to provide a
neutral point for grounding purposes. Syn:grounding transformer
USBM, 2
Water impregnated with copper; found in copper mines. Standard, 2
A graphical method for finding the lost part of a vein on the other side
of a fault. Nelson
a. The native metallic element, Zn.
b. A bluish-white, lustrous metal. Employed to form numerous alloys with
other metals including brass, nickel silver, commercial bronze, spring
brass, soft solder, and aluminum solder. Used extensively by the
automotive, electrical, and hardware industries.
Handbook of Chemistry and Physics, 3
A light-blue mineral, Zn6 Al6 (SO4 )2 (OH)
26 .5H2 O .
See:sphalerite
See:hydrozincite; zinc oxide.
Wooden or enamel-ware rectangular box, with a bottom grid that supports
zinc shavings. Used in the cyanide process to precipitate dissolved gold
from a pregnant solution. Its place was taken by use of zinc dust.
See also:Merrill-Crowe Process
White; ZnCO3 ; soluble in acids, in alkalies, and in ammonium salt
solutions; insoluble in water; and dissociates losing carbon dioxide at
300 degrees C. Used in ceramics and as a pigment. Also used less
accurately to refer to any of several basic carbonates of zinc, which
include the zinc-ore mineral hydrozincite, Zn5 (CO3 ) (sub
2) (OH)6 or Zn5 (OH)6 (CO3 )2 and
synthetically prepared pigments of the same or similar composition.
Syn:smithsonite; calamine; zinc spar.
Handbook of Chemistry and Physics, 2
White; hexagonal; ZnCl2 ; poisonous. Obtained by the solution of
zinc, or zinc oxide, in hydrochloric acid, or by burning zinc in chlorine.
Used in galvanizing iron, as a catalyst, as a dehydrating agent, as a
condensing agent, as a wood preservative, as an ingredient in soldering
fluxes, in burnishing and polishing compounds for steel, in
electroplating, in glass-etching compositions, in petroleum refining, and
in pigments. Handbook of Chemistry and Physics, 2
ZnCrO4 ; a golden-yellow pigment. Of variable composition; the
chemically pure zinc chromate, a yellow crystalline powder is said to be
zinc chromate heptahydrate, ZnCrO4 .7H2 O . Called zinc
yellow, but this term is also applied to hydrated zinc chromate and to
hydrated zinc-potassium chromate. Another zinc chromate is dark green to
black and has a different composition; isometric. ZnCr2 O4 .
Syn:zinc chrome; zinc yellow. Handbook of Chemistry and Physics, 2
See:zinc chromate; zinc yellow.
Finely divided zinc that usually contains small amounts of zinc oxide and
impurities. Also called powdered zinc; zinc gray. Fay
See:zinc dust
White; amorphous; ZnS2 O4 ; and soluble in water. Used as a
depressant in flotation. CCD, 2
A red to yellow brittle mineral; (Zn,Mn)O. It is an ore of zinc, as in New
Jersey where it is associated with franklinite and willemite.
Syn:red zinc ore; red zinc oxide; ruby zinc; spartalite. AGI
See:zinkenite
Carrying zinc. Weed, 2