issue contents

ISSN: 2056-9890

June 2010 issue

Highlighted illustration

Cover illustration: Next to orthorhombic [alpha]-SrB4O7, trigonal [beta]-SrB4O7 is the second polymorph of this composition. Whereas the borate frameworkof [alpha]-SrB4O7 is solely composed of corner-sharing BO4 tetrahedra, in [beta]-SrB4O7 it is made up of BO3 triangles and BO4 tetrahedra in a 1:1 ratio, leading to a considerably lower density for the [beta]-polymorph. The Sr2+ cations are located in channels running parallel to [001]. See Vasiliev, Cherepakhin & Zaitsev [Acta Cryst. (2010). E66, i48].

inorganic compounds

metal-organic compounds