The crystal structure of tristrontium trigallium tetraborate oxide hydroxid
e has been determined by X-ray diffraction using a crystal grown by hydroth
ermal crystallization of a strontium gallo-borate glass. It represents a ne
w orthoborate structure type built of complex layers formed by BO3 triangle
s sharing corners with Ga2O7 tetrahedral dimers and GaO4OH square pyramids.
The Sr atoms occupy both inter- and intralayer sites.