a. Refractory bricks used to line roofs of furnaces, where there is no
contact with basic molten material. Pryor, 3
b. Silica cemented with a binding agent, for example, slurried lime.
Pryor, 3
One who forms silica brick for use in lining furnaces and ovens of various
kinds. DOT
Refractories made from quartzite, bonded by lime, and consisting
essentially of silica, usually with about 2% of lime, and small quantities
of iron oxide, alumina, and alkalies. Henderson
An industrial term for certain sandstones and quartzites that contain at
least 95% silica (quartz). It is used as a raw material of glass and other
products. CF:silica sand
An industrial term for a sand or an easily disaggregated sandstone that
has a very high percentage of silica (quartz). It is a source of silicon
and a raw material of glass and other industrial products.
CF:silica rock
a. A compound whose crystal structure contains SiO4 tetrahedra,
either isolaed or joined through one or more of the oxygen atoms to form
groups, chains, sheets, or three-dimensional structures with metallic
elements. Silicates were once classified according to hypothetical
oxyacids of silicon (see metasilicate and orthosilicate) but are now
calssified according to crystal structure (see nesosilicate, sorosilicate,
cyclosilicate, inosilicate, phyllosilicate, tectosilicate). AGI
b. A term used in the Joplin district, Missouri, for zinc carbonate.
Usually refers to Forsterite brick. Strictly, most bricks are silicate
bricks of one kind or other.
In the metallurgical nomenclature of slags, the ratio of the weight of
oxygen in the acid to the weight of oxygen in the base. Newton, 1
Minerals with crystal structure containing SiO4 tetrahedron
arranged as (1) isolated units, (2) single or double chains, (3) sheets,
or (4) three-dimensional networks. Leet, 1
The process of converting into or replacing by silicates, esp. in the
formation of skarn minerals in carbonate rocks. CF:silicification
silicated. AGI
A special method of sealing off water, for example, reducing its inflow
into shafts, by the injection of calcium silicate under pressure. It is
sometimes used to reduce the leakage of water through defective lengths of
tubbing in a shaft. The calcium silicate is highly impervious on
solidification, behind the leaking tubbing. Nelson
A disease of the lungs thought to be caused by silicates.
a. Of, relating to, or derived from silica; containing or resembling
silica or a silicate; silicic. Also spelled silicious. Webster 3rd
b. Said of a rock containing free silica or, in the case of volcanic
glass, silica in the norm.
Dust arising from the crushing or other dry working of sand, sandstone,
trap, granite, and other igneous rocks is included in this class.
Siliceous dusts are not soluble in body fluids, and when introduced into
the respiratory tract in the form of particles of certain sizes and in
sufficiently high concentration, they produce nodular growths that often
result in a form of pneumonoconiosis that has been known as silicosis or
"stone cutters" consumption. Pit and Quarry
A general term including both diatomaceous earth (diatomite) and
radiolarian earth (radiolarite).
A fire clay composed mainly of fine white clay mixed with clean, sharp
sand, found in pockets. Nelson
Materials that consist mainly of SiO2 and must be low in metallic
oxides and alkalies. Newton, 1
These are pelagic deposits that contain a large percentage of siliceous
skeletal materials produced by planktonic plants and animals. The
siliceous oozes are subdivided into two types on the basis of the
predominance of the forms represented, namely (1) diatom ooze, containing
large amounts of diatom frustules, therefore, produced by plankton plants,
and (2) radiolarian ooze, containing large porportions of radiolarian
skeletons formed by these plankton animals. Hunt
Another name for gold-quartz ores. Newton, 1
Generally, rocks high in silica.
A hard, fine-grained rock of shaly structure generally believed to be
shale altered by silicification. Syn:phthanite
See also:porcellanite