Oxygen-annealed crystals, atomic

Indirect indication that Oi or Ozn might be responsible for H-I is the annealing temperature of this center. It is known that ZnO crystals, when heated in air at temperatures above 1000 °C become nonstoichiometric in composition through formation of excess zinc atoms resulting from the more rapid loss of oxygen atoms. It means that of all native defects Oi and Ozn... 

The other bit of information researchers picked up was that when the crystal was in its nonsuperconducting shape, it had six oxygen atoms per molecule in its chains in its superconducting form, it had seven. Moreover, the researchers found that if they annealed their ceramic—the step that followed heating it in the oven—in an inert atmosphere, it lost oxygen atoms when they annealed it under oxygen, the supply was replenished. The arrangement of... 

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