Abstract
The asymmetric unit of the title compound, β-SrB4O7, contains five Sr atoms (three located on a threefold rotation axis), twelve B and 21 O atoms. The structure is made up from BO3 triangles and BO4 tetrahedra in a 1:1 ratio. Pairs of BO3 triangles are linked to BO4 tetrahedra via common corners, forming chains. These chains are further linked to adjacent chains through corner-sharing, leading to a three-dimensional framework with channels running parallel to [001]. The Sr2+ ions reside in the channels and exhibit strongly distorted polyhedra The density of the β-polymorph is considerably lower than that of α-SrB4O7, which is constructed solely from BO4 tetrahedra.
Highlights
The asymmetric unit of the title compound, -SrB4O7, contains five Sr atoms, twelve B and 21 O atoms
Pairs of BO3 triangles are linked to BO4 tetrahedra via common corners, forming chains
These chains are further linked to adjacent chains through corner-sharing, leading to a three-dimensional framework with channels running parallel to [001]
Summary
R factor = 0.030; wR factor = 0.064; data-to-parameter ratio = 14.0. The asymmetric unit of the title compound, -SrB4O7, contains five Sr atoms (three located on a threefold rotation axis), twelve B and 21 O atoms. BO3 triangles and BO4 tetrahedra in a 1:1 ratio. Pairs of BO3 triangles are linked to BO4 tetrahedra via common corners, forming chains. These chains are further linked to adjacent chains through corner-sharing, leading to a three-dimensional framework with channels running parallel to [001]. Ions reside in the channels and exhibit strongly distorted polyhedra The density of the -polymorph is considerably lower than that of -SrB4O7, which is constructed solely from
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