" /> " /> " /> " /> " /> " /> octahedra linked by three shared edges, which are connected by the sharing of four O⋯O edges to form chains extending along (001). The B atoms hold the chains together and form B2O5 groups. octahedra linked by three shared edges, which are connected by the sharing of four O⋯O edges to form chains extending along (001). The B atoms hold the chains together and form B2O5 groups. octahedra linked by three shared edges, which are connected by the sharing of four O⋯O edges to form chains extending along (001). The B atoms hold the chains together and form B2O5 groups. octahedra linked by three shared edges, which are connected by the sharing of four O⋯O edges to form chains extending along (001). The B atoms hold the chains together and form B2O5 groups. octahedra linked by three shared edges, which are connected by the sharing of four O⋯O edges to form chains extending along (001). The B atoms hold the chains together and form B2O5 groups. octahedra linked by three shared edges, which are connected by the sharing of four O⋯O edges to form chains extending along (001). The B atoms hold the chains together and form B2O5 groups.