What Is The Structure Of Silver Perrhenate?

Silver perrhenate is a compound that consists of silver cations (Ag+) and perrhenate anions (ReO4-). The perrhenate anion has a tetrahedral shape, with the rhenium atom in the center and four oxygen atoms at each vertex. Each oxygen atom is bonded to the rhenium atom through a double bond, resulting in a negative charge on the entire anion.

In the crystal structure of silver perrhenate, the silver cations sit between layers of perrhenate anions arranged in a hexagonal close-packed array. The silver cations are coordinated to six oxygen atoms from six different perrhenate anions, forming distorted octahedra around each silver ion. The coordination geometry of the silver ions is described as trigonal-prismatic because three of the ligands are in one plane and the other three are perpendicular to that plane.

The overall crystal structure of silver perrhenate can be described as a layered structure with alternating layers of silver cations and perrhenate anions. The layers are connected through weak interlayer interactions, such as van der Waals forces, resulting in a relatively soft material with low mechanical strength.