Answers are grounded in this paper and cite their sources.
Hydrogen in rutile has two influences on the electrical properties: Verneuil crystals contain hydrogen compensating the trivalent impurities. Excess hydrogen acts as an electron donor, thereby increasing the conductivity. Removal of hydrogen above 650°C in vacuum causes structural changes accompanied by enhanced conductivity and dielectric loss. There is also a change in the activation energy for diffusion at this temperature. Values of the coefficient of diffusion of protons in the temperature range 450-800°C in crystals of differing impurity content are presented. The position of the hydrogen, in the basal plane of the rutile lattice, is confirmed by the dichroism of the absorption. Weight-loss experiments suggest that hydrogen leaves the crystal in combination with oxygen in the proportions required to form water.
No takes yet. Share an insight, caveat, or question.
Graham J. Hill (1968) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: