The coefficient of friction of a specific type of tile, such as Combed United Statess Crowsfoot Schist tiles, may vary depending on various factors such as the tiles surface finish, texture, and the conditions in which it is installed. Without specific information about the tiles characteristics and testing results, it is difficult to provide an accurate coefficient of friction.

It is recommended to consult the manufacturer, supplier, or any available technical documentation of Combed United Statess Crowsfoot Schist tiles for the specific coefficient of friction information. They should be able to provide the necessary data for determining the coefficient of friction of the tiles in question.