A variety of melanterite containing copper (4.40% CuO) and magnesium
(4.29% MgO). Also spelled kuprojarosit. See also:jarosite
Spencer, 1
A magnesian cuprian variety of melanterite.
A monoclinic copper magnesium sulfate in bluish-green crusts at Mt.
Vesuvius, Italy; of doubtful validity.
Interpretation of the Russian name medmontite. See also:medmontite
Spencer, 4
A former name for bayldonite.
A tetragonal mineral, CaCuSi4 O10 ; in small blue grains at
Mt. Vesuvius, Italy.
A triclinic mineral, (H3 O)2 Cu(UO2 )2 (SiO
4 )2 .2H2 O ; strongly radioactive; greenish-yellow or
grass-green; a secondary mineral resulting from alteration of pitchblende
associated with other uranium minerals.
See:cuprite
a. A timber frame, circular or square, wedged in a shaft to make a
foundation for walling or tubbing, or to support, with or without other
timbering, the walls of the shaft.
b. The heavy frame or sill at the top of a shaft.
c. In tunnel construction, a ring of brickwork or of cast iron, at the
base of the shaft, surmounting a circular orifice in the roof of the
tunnel. A drum curb is a flat ring of cast iron for supporting the
brickwork having the same diameter externally as the shaft of brickwork.
Temporary curbs of oak are also used. Fay
d. An iron border to the incorporating bed of a gunpowder mill.
Webster 3rd
e. An iron casing in which to ram-load molds for casting.
Webster 2nd
f. The walls of a chamber in which sulfuric acid is manufactured.
Webster 3rd
g. A wood, cast-iron, or reinforced concrete ring, made in segments,
forming a foundation for a masonry or cast-iron circular shaft lining. The
curb is set on a firm ledge of rock notched into the periphery of the
shaft. It may be removed at a later stage. Syn:wedging curb;
bricking curb; crib; walling curb. See also:foundation curb;
water ring. Nelson
h. A socket of wrought iron or steel for attaching a ring hook or swivel
to the end of a rope used for mine hoisting or haulage. CTD
i. A coaming around the mouth of a well or shaft. See also:binder
Hess
j. A shaft support ring for walling or tubbing. Mason
Eng. A solid wood lining of a shaft. Syn:curb
A unit of measurement of radioactivity, defined as the amount of a
radionuclide in which the decay rate is 37 billion disintegrations per
second, which is approx. equal to the decay rate of 1 g of pure radium.
AGI
The temperature at which there is a transition in a substance from one
phase to another of markedly different magnetic properties. Specif., the
temperature at which there is a transition between the ferromagnetic and
paramagnetic phases. Webster 3rd
The susceptibility of a paramagnetic substance is inversely proportional
to the absolute temperature. A law of magnetism that has been replaced by
the Curie-Weiss law. Webster 3rd
The temperature of magnetic transformation below which a metal or alloy is
magnetic and above which it is paramagnetic. ASM, 1
An orthorhombic mineral, Pb2 U5 O17 .4H2 O ;
radioactive; orange-red; an alteration product of uraninite.
Shrop. Ironstone exhibiting cone-in-cone formation.
A folded and distorted oil shale.
Shrop. Shale belonging to the coal formation, which on exposure to the air
hardens and assumes a peculiar form, sometimes called cone-upon-cone. Also
called curlstone. Arkell
a. The part of a fluid body esp. as air or water, that is moving
continuously in a definite direction, often with a velocity much swifter
than the average, or in which the progress of the fluid is principally
concentrated. AGI
b. A horizontal movement or continuous flow of water in a given direction
with a more or less uniform velocity, producing a perceptible mass
transport, set in motion by winds, waves, gravity, or differences in
temperature and density, and of a permanent or seasonal nature, esp. an
ocean current. AGI
c. The velocity of flow of a fluid in a stream. AGI
d. The swiftest part of a stream. Webster 3rd
e. A tidal or a nontidal movement, often horizontal, of lake or ocean
water. Syn:drift
f. Condition of flowing. Flow marked by force or strength. Syn:flow;
flux. Webster 3rd
Any bedding or bedding structure produced by current action; specif.
cross-bedding resulting from water or air currents of variable direction.
See also:false bedding
The current per unit area perpendicular to the direction of current flow.
AGI