STRUCTURE OF SR3V10O28.22H(2)O

The crystal structure of hydrated strontium decavanadate, Sr3V10O28.22 H(2)O, has been determined. It contains two types of strontium ions: t he first is coordinated to seven water molecules which define a pentag onal bipyramid; the second bonds to five molecules of water and three O atoms of different decavanadate ions, thereby bridging between decav anadate ions to produce layers of formula [Sr2V10O38H20](n) on the cry stallographic plane (100). The heptacoordinated Sr and the five molecu les of water associated with it are located between the different laye rs.