Editing Pyrophyllite (section)

==Uses==
The compact variety of pyrophyllite is used for slate pencils and tailors' chalk ([[French chalk]]), and is carved by the Chinese into small images and ornaments of various kinds. Other soft compact minerals ([[steatite]] and [[pinite]]) used for these Chinese carvings are included with pyrophyllite under the terms [[agalmatolite]] and [[pagodite]].{{Citation needed|date=August 2010}}

Pyrophyllite is easily machineable and has excellent thermal stability, so it is added to clay to reduce thermal expansion when firing, but it has many other industrial uses when combined with other compounds, such as in insecticide and for making bricks. Pyrophyllite is also widely used in [[Pressure experiment|high-pressure]] experiments, both as a [[diamond anvil cell|gasket]] material and as a pressure-transmitting medium.<ref>{{cite journal| title = Effect of precompression on pressure-transmitting efficiency of pyrophyllite gaskets| author= L. Fang| doi = 10.1080/08957950701553796| journal = Journal High Pressure Research| volume =27| year = 2007 | issue= 3| page = 367|bibcode = 2007HPR....27..367F | s2cid= 97317483|display-authors=etal}}</ref>