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Kaolinite (/ ˈ k eɪ. ə l ə ˌ n aɪ t,-l ɪ-/ KAY-ə-lə-nyte, -lih-; also called kaolin) [5] [6] [7] is a clay mineral, with the chemical composition Al 2 Si 2 O 5 4.It is a layered silicate mineral, with one tetrahedral sheet of silica (SiO 4) linked through oxygen atoms to one octahedral sheet of alumina (AlO 6).
Generally, the price of Yixing teapots is dependent on factors such as age, clay, artist, style and production methods. The more expensive pots are shaped by hand using wooden and bamboo tools to manipulate the clay into form, while cheaper Yixing pots are produced by slipcasting .
Five Yixing clay teapots showing a variety of styles from formal to whimsical. Yixing clay (simplified Chinese: 宜兴泥; traditional Chinese: 宜興泥; pinyin: Yíxīng ní; Wade–Giles: I-Hsing ni) is a type of clay from the region near the city of Yixing in Jiangsu Province, China, used in Chinese pottery since the Song dynasty (960–1279) when Yixing clay was first mined around China's ...
English China Clays was incorporated in April 1919 through the amalgamation of three of the largest producers: Martin Bros.(established in 1837), West of England China Clay & Stone (1849) and the North Cornwall China Clay Company (1908). [1] The three companies accounted for around half the industry's output at the time. [2]
Chinese porcelain is mainly made by a combination of the following materials: Kaolin – essential ingredient composed largely of the clay mineral kaolinite. [6]Porcelain stone – decomposed micaceous or feldspar rocks, historically also known as petunse.
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Clay minerals can be classified as 1:1 or 2:1. A 1:1 clay would consist of one tetrahedral sheet and one octahedral sheet, and examples would be kaolinite and serpentinite. A 2:1 clay consists of an octahedral sheet sandwiched between two tetrahedral sheets, and examples are talc, vermiculite, and montmorillonite.