ENERGY|coal and mining industries|mining product · ENERGY|coal and mining industries|mining product|earths and stones
- cré chaoilín Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- ball clay
- en
- Definition naturally occurring fine grained clay, commonly consisting of 20-80% kaolinite, 10-25% mica and 6-65% quartz, usually light in colour and highly plastic Reference "COM-EN, based on:- Wikipedia > Ball clay. http://en.wikipedia.org/wiki/Ball_clay - Byron Arts > Ceramics and Pottery Definitions. http://www.byronarts.com/ceramics_definitions.htm [18.1.2011]"
- Comment "Ball clays are relatively scarce deposits due to the combination of geological factors needed for their formation and preservation. They are mined in parts of the Eastern United States and from three sites in Devon and Dorset in South West England. They are commonly used in the construction of many ceramic articles, where their primary role is to either to impart plasticity or to aid rheological stability during the shaping processes.Note ref.: Wikipedia > Ball clay. http://en.wikipedia.org/wiki/Ball_clay [18.1.2011]"