Abstract
The crystal structure of shattuckite (Cu5(OH)2(SiO3)4), space group Pcab, a=9.88, b=19.82, c=5.40Å, Z=4, has been investigated by three dimensional intensity data. The newly determined structure is the same as the structure studied by Evans and Mrose (1966) and Le Bihan (1967) in the projection parallel to the c-axis, but the z-parameters of silicon, copper and oxygen atoms are different. The configuration of the nearest neighbours of copper atoms are also different. The copper atoms stay at the centers of the rectangles of oxygen atoms, showing the usual coordination of Cu2+ in copper bearing minerals in general.
