Clay
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Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolinite, Al 2 Si 2 O 5 4). Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impurities, such as a reddish or brownish colour from small amounts of iron oxide.
Clay, soil particles the diameters of which are less than 0.005 millimeter; also a rock that is composed essentially of clay particles. Rock in this sense includes soils, ceramic clays, clay shales, mudstones, glacial clays, and deep-sea clays. Clay materials are plastic when wet and coherent when dry.
Apr 27, 2010 · Clay is a soft, loose, earthy material containing particles with a grain size of less than 4 micrometres (μm). It forms as a result of the weathering and erosion of rocks containing the mineral group feldspar (known as the ‘mother of clay’) over vast spans of time. During weathering, the feldspar content is altered by hydrolysis (reaction ...
The term clay is generally applied to (1) a natural material with plastic properties, (2) particles of very fine size, customarily those defined as particles smaller than two micrometres (7.9 × 10 −5 inch), and (3) very fine mineral fragments or particles composed mostly of hydrous-layer silicates of aluminum, though occasionally containing ...
The meaning of CLAY is an earthy material that is plastic when moist but hard when fired, that is composed mainly of fine particles of hydrous aluminum silicates and other minerals, and that is used for brick, tile, and pottery; specifically : soil composed chiefly of this material having particles less than a specified size. How to use clay in a sentence.
CLAY definition: 1. thick, heavy soil that is soft when wet, and hard when dry or baked, used for making bricks and…. Learn more.
Hexagonal sheets of the clay mineral kaolinite (SEM image, 1,340× magnification). Clay is a very fine-grained geologic material that develops plasticity when wet, but becomes hard, brittle and non–plastic upon drying or firing. It is a very common material, and is the oldest known ceramic.Prehistoric humans discovered the useful properties of clay and used it for making pottery.
Clay is a natural material made up of tiny particles of rock. When clay is mixed with enough water, it feels like soft, gluey mud. Unlike plain mud, however, clay holds its shape. Clay can be pinched, rolled, cut, or built up in layers to form shapes of all kinds.
Clay. Clay is a fine-grained silicate mineral made when rocks break down. Wet clay is soft and can be shaped to make pottery, bricks and other things. When it is shaped and then fired in a kiln to make it hard, it becomes pottery. Clay often contains some water because the water molecules stick to the tiny grains.
