Abstract
Two sorts of etching solution revealing etch pits at sites of both aged and fresh dislocations on the (0001) surface of zinc single crystals have been found. One of them (solution N-1) is composed of 80 cm3 of glacial acetic acid, 0.5 cm3 of 35∼37% hydrochloric acid, 0.5 cm3 of 60∼62% nitric acid, 0.5 cm3 of 47% hydrobromic acid and 1000 cm3 of deionized water, and produces hexagonal pyramidal pits whose edges are parallel to ⟨11\bar20⟩ directions. Another solution (solution N-2) is composed of 10 g of ammonium nitrate, 10 g of ammonium chloride and 1000 cm3 of 28% ammonia water, and produces hexagonal pyramidal pits whose edges are parallel to ⟨1\bar100⟩ directions. Both the solutions can develop deep pits without roughening the observation surface.
