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Keywords:
Hydrous,
Silicate,
Earthy,
Bentonite,
Feldspathic
A soft earth, which is plastic, or may be molded with the hands, consisting of hydrous silicate of aluminium. It is the result of the wearing down and decomposition, in part, of rocks containing aluminous minerals, as granite. Lime, magnesia, oxide of iron, and other ingredients, are often present as impurities.
Earth in general, as representing the elementary particles of the human body; hence, the human body as formed from such particles.
Medium used in some elements; usually a blend of attapulgas and montmorillonite clays.
Any of a number of hydrous aluminosilicate minerals with sheetlike crystal structure, formed by the weathering and hydration of other silicates. Also, any mineral fragments smaller than 0.0039 mm.
Ya know the rain cycle? Water evaporates, raises into the sky, accumulates, gets to heavy to float as a gas, falls as rain on the mountains; as it rolls over the rocks ,it picks up small particles and carries them to streams, rivers and down to the sea. Well, those slimey little particles that accumlate on the river bottoms are what we call clay. Over the millinia they form deposits and we mine it. When heated to a high temperture it is no longer soluable in water and it becomes permainently hard.
A clastic mineral particle of any composition that has a grain size smaller than 1/256 mm. The term is also used in reference to a broad category of hydrous silicate minerals in which the silica tetrahedrons are arranged into sheets.
a mineral substance formed when rocks are 'weathered' or broken down by water. Clay is used with graphite to make the lead in pencils.
An inorganic soil component having particles that are less than 0.002 millimetres in diameter.
A particle less than 0.004mm (4 micrometers) in diameter. Also a group of layer-silicate minerals characterized by poor crystallinity and fine particle size.
Sedimentary material composed of fragments with a diameter of less than 1/256 mm. Clay particles are smaller than silt particles.
A fine-grained mineral material used as a filler in papermaking or as coating pigments.
Clay is a wonderful sculpting material that is made up of many types and textures. Once molded, it's then fired in a kiln for a predetermined amount of time depending on the actual clay itself, as some types require more time in the oven than others.
Fine grained sediment, with a particle size of less than two-thousandths of a millimeter. Clay has the property of plasticity when wet.
Any of the earthen materials used to make ceramic items. It becomes hard when fired at high temperatures.
A constituent of soils that consists of particles less than 0.002 mm in size.
very fine soil particles; it is smooth and can hold nutrients, but water and air do not move through it well
a rock or mineral fragment being smaller than 0.00016 inches (1/256 millimeters ) in diameter.
First read the entry on cations. Ok. Because clay is attracting cations, fertilizers (which are comprised of many minerals that will readily form cations in solution) will become "attached" to the clay, rather than be left available for the plant they were intended for. To prevent this, lime can be added to the soil ahead of time. The lime releases a preliminary batch of cations that will effectively neutralize most of the clay and thereby allow fertilizers to reach plants. Clay particles are the smallest inorganic component of soil, measuring no more that .002 mm across. In a soil heavy in clay, water and air will have trouble penetrating and reaching soil organisms and plants. Break up clay soils by adding organic material.
A water softened rock, composed of Aluminium Silicate, that can be moulded to shape. When fired it becomes a ceramic. Main use in the production of pottery. See ARTIFACTS or KILN
a fine grained and heavily textured soil that is known for its ability to hold water and nutrients.
Very fine-grained sedimentary rock. It is a soft rock that forms a paste when mixed with water, and hardens when baked. It is mainly used to make bricks.
A naturally occurring earthy mineral that is plastic when wet but becomes permanently hard when heated. Clays are formed by the weathering of feldspathic rock. Primary clays are found at the site of the parent stone while secondary clays are found downstream. Clays are composed of hydrated aluminum silicates, such as kaolinite, illite, palygorskite, attapulgite, bentonite, and montmorillonite. Small amounts of other minerals can change the color (white, yellow, brown or red) and texture of the clays. When pure, clay is a fine, white, amorphous powder which becomes plastic when water is added. At high temperatures, clays became hard due to the loss of water and are used to make pottery, porcelain and bricks. Clay is also used as a filler and whiting in paper, paints and grounds.
A flat or plate shaped mineral or soil grain, less than 0.002 mm across. Clay is also the name of a specific soil texture that contains 40 percent or more particles of clay size.
Very fertile, heavy, moisture-retentive soil, prone to compaction and surface capping.
A size fraction less than 0.002mm in equivalent diameter. Using the UK classification a clay soil contains 35% or more clay and less than 45% sand and less than 45% silt (of course the total components would not exceed 100%).
A fine-grained material composed of hydrous aluminum silicates.
is soil particles consisting of mineral particles less than 0.002 mm in diameter. Many of the properties of soil depend on the type and quantity of clay particles in the soil.
firm, fine-grained earth produced by the chemical decomposition of rocks; when mixed with water it is used to make bricks, pottery, and other ceramics
particles less than 1/256 mm in size
General term for a natural fine-grained material, kaolin, which is used as filler and as coating pigments in paper manufacture.
A group of submicroscopic silicate minerals related to mica. Clay-sized particles are less than 0.0039 mm in diameter.
A fine grained soil or the fine grained portion of a soil that can be made to exhibit plasticity within a range of water contents, and which exhibits considerable strength when air dry. Clay particles are smaller than 0.074mm (#200 sieve) and must plot above the A- line on the plasticity chart (ASTM D2487).
as a soil separate, r ock or mineral soil particles .002 mm in diameter. As a soil textural class, soil material that is 40 % or more in clay, 45 % sand, and 40 % silt.
Cohesive soil whose individual particles are not visible to the unaided human eye (less than 0.002 mm in diameter). Clay can be molded into a ball that will not crumble.
natural earth material with various applications in sculpture: a material that can be manipulated or moulded by hand, when moist. It can be dried in the air or fired in a kiln to make it a permanent relatively nonporous material: used for the direct process of modelling: clay models are used for the indirect process of casting. See also Modelling Clay
A fine-grained natural material which when wet is characterised by its plasticity, the property which allows it to be deformed by pressure into a desired shape without cracking and to keep this shape when the pressure is removed. In addition to clay minerals (q.v.), clay typically contains quartz and may contain other minerals such as feldspar, calcite and iron oxide. The clay body must be carefully prepared to remove foreign matter such as stones or roots, and be mixed evenly throughout.
a very fine-grained soil that is plastic when moist but hard when fired
a fine-grained earthy material which results from the weathering and decomposition of rocks
a fine textured soil usually forms very hard lumps or clods when dry and is quite plastic and is usually sticky when wet
a soft thin platy mineral
A minute soil particle less than .002 mil. in diameter.
soil particles visible only with magnification of 100 power or more; plate-like in shape (less than .002 millimeter in diameter).
Tiny soil particles less than 0.002mm in diameter. Clay is sticky when wet. Clay soils have at least 40% clay in them with less than 45% sand or 40% silt.
bodies are mixtures of different types of clays and minerals for a specific ceramic purpose.
soil made of very tine organic and mineral particles: Clay is not suitable for container gardening.
Clay is a natural, earthy material that can tightly attach itself to surfaces making removal difficult.
A textural class of soils consisting of particles less than 0.002 millimeters in diameter.
A mineral particle of any composition having a diameter less than 0.002 mm.
A particle whose diameter is in the range of 0.00024 to 0.004 mm.
Mud; moist, sticky dirt. In ceramics, clay is the basic material, usually referring to any of a certain variety of mixtures of such ingredients - fine-grained, firm earthy material that is plastic when wet, brittle when dry, and very hard when heated. The most common types of ceramic clays are earthenware (terra cotta is an example), stonewares, and porcelain. Also, a hardening or nonhardening material having a consistency similar to clay, often called modeling clay or Plasticine.
Very fine sediment particles that are less than 0.004 mm in diameter - component of mud
Particles with a diameter of less than 0.002mm. They are plate like in shape.
Earth that is used in ceramics, it is wet and hardens after drying or heating.
soil which consists of illite, kaolin, micas, vermiculite, and other mineral particles; clay particles are small and the spaces between them are small; clay soils absorb water slowly but can hold water for longer than a sandy soil.
granular or finely divided mineral materials used for treating petroleum. Clays used in petroleum processing include fuller's earth, bauxite, bentonite, and montmorillonite. Most common clay used in the decolorization of petroleum waxes is bauxite.
A weathered form of aluminosilicate mineral particles, less than 0.002 mm in diameter.
The putty-like portion of soil particles that when watered and air-dried, can exhibit a strong plastic-like nature.
a very fine-grained material consisting of quartz, hydrated aluminium silicate and fragments of organic matter, occurring in soils and sedimentary deposits. It has remarkable plasticity when wet, becoming hard upon heating, qualities which have seen its use in the manufacture of bricks, tiles, ceramics, cement, etc; from Old English claeg, related to Old German klia, Latin glus, Greek gloios 'glue, sticky oil'.
soil type composed of small particles, usually reddish to gray in color.
A family of aluminum- and silica-rich minerals that commonly form by reaction of feldspars with hydrothermal solutions. See also kaolinite.
is a component of most soils. Composed mainly of fine particles of hydrous aluminum silicates and other minerals, it is plastic when moist but hard when fired. It is abundant, found in concentration at the bottoms of streams or rivers or in veins of earth where pre-historic streams were located. Artists use it because of it's versatile modeling and finishing potentials and because once fired it becomes a hard, rock-like body that lasts for centuries.
A natural, fine-grained earthlike material, the product of the geological weathering or aging of the surface of the earth. The root of the word "clay" is "sticky": sticky soil.
A soil component consisting of very fine particles (0.002 mm diameter). Clay particles provide ample surface area for adsorption of molecules. Clay soils provide the most resistance to leaching. Soil texture and many other soil characteristics are determined by the relative amounts of sand, silt, clay and loam in a soil.
a term given to hydrous silicates of aluminia generally deriving from the decomposition of earlier rocks. Examples are slate clay, fire clay, plastic clay, china or porcelain clay and common clay or loam.
The mineral soil particles less than 0.002 millimeters in diameter.
A mixture of very fine grains of micaceous substances. Clay is plastic when wet and hardens when heated. It consists mainly of hydrous aluminum silicates.
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