 This is an unusual form of hydrogen bonding since the two hydroxide ion involved would be expected to point away from each other.The hydrogen atoms have been located by neutron diffraction experiments on α-AlO(OH) (diaspore).The O–H–O distance is very short, at 265 pm; the hydrogen is not equidistant between the oxygen atoms and the short OH bond makes an angle of 12° with the O–O line.