Two barium-containing borates BaMBO (M = Al, Ga) were synthesized via the solid-state method under atmospheric pressure. The 3D configurations of BaGaBO and BaAlBO are comprised of [BaO]/[GaO]/[BO] and [BaO]/[AlO]/[BO], respectively, of which the [BO] units possess unusual edge-sharing [BO] tetrahedra. From BaGaBO to BaAlBO, the B-O units are transformed from corner-sharing to edge-sharing linkages, which arises from the directional shrinkage caused by the Ba-O and M-O skeletons. The phonon spectra of these two compounds do not show imaginary frequency at any wave vectors, indicating that both of them are kinetically stable.
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| http://dx.doi.org/10.1021/acs.inorgchem.9b01157 | DOI Listing |
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