Abstract
The unprecedented borate hydride Sr5(BO3)3H and deuteride Sr5(11BO3)3D crystallizing in an apatite-related structure are reported. Despite the presence of hydride anions, the compound decomposes only slowly in air. Doped with Eu2+, it shows broad-band orange-red emission under violet excitation owing to the 4f65d–4f7 transition of Eu2+. The observed 1H NMR
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