Clay

https://en.wikipedia.org/wiki/Clay
Clay is a type of fine grained natural soil material containing clay minerals 1 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 2 3

https://www.britannica.com/science/clay-geology
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

https://en.wikipedia.org/wiki/Clay_mineral
Clay minerals are hydrous aluminium phyllosilicates e g kaolin Al 2 Si 2 O 5 4 sometimes with variable amounts of iron magnesium alkali metals alkaline earths and other cations found on or near some planetary surfaces

https://www.britannica.com/science/clay-mineral
Clay mineral any of a group of important hydrous aluminum silicates with a layer sheetlike structure and very small particle size They may contain significant amounts of iron alkali metals or alkaline earths

https://dictionary.cambridge.org/dictionary/english/clay
CLAY definition 1 thick heavy soil that is soft when wet and hard when dry or baked used for making bricks and Learn more

https://www.britannica.com/science/clay-mineralogy
Clay mineralogy the scientific discipline concerned with all aspects of clay minerals including their properties composition classification crystal structure and occurrence and distribution in nature

https://www.sciencelearn.org.nz/resources/1771-what-is-clay
Clay is a soft loose earthy material containing particles with a grain size of less than 4 micrometres m 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

https://geologyscience.com/minerals/clay-minerals
What is the role of clay minerals in agriculture Clay minerals can affect soil fertility nutrient cycling and water holding capacity which can impact plant growth and crop yields They can also be used to improve soil structure and prevent soil erosion How do clay minerals impact the environment

https://www.newworldencyclopedia.org/entry/Clay
Clay is a term used to describe a group of fine grained silicate minerals known as aluminum phyllosilicates containing variable amounts of chemically associated water Clay is plastic when wet which means it can be easily shaped