was related to the conventional stretching vibrations of B–O bond of the trigonal BO3 unitswhichwere shared in various borate groups containing nonbridging oxygens (NBO) such as metaborate, pyroborate and orthoborate groups
was related to the conventional stretching vibrations of B–O bond of the trigonalBO3 unitswhichwere shared in various borate groups containing nonbridgingoxygens (NBO) such as metaborate, pyroborate and orthoborategroups