Cbemlcal Etching of CdTe and CdSe

Single crystats of CdTe and CdSe have been grown by vapcr pnase deposition . Crystals grown in the from of platelets were studied by X-ray diffraction Laue method. It was found llial the faU;:) of O1Te with zincblcndc structure are of {tIl} type and tbose ofCdSe with wunlile structure are of {l120} or {IOIO} types. Platelets of CdTe have one smooth face and one rough face which can be distinguished even wllh bear eyes. Chemical etching of CdTe revealed that the smooth face is composed of Cd atoms and the other face of Te atoms. However, chemical etching of CdSe did nOI show any polarity because both types of crystalline planes {I120} and {lotO} are composed of both alOms. The chemical solotion of Hel, MI. Br2 (2:3:0.3) was found 10 aCI 3. .. a suitable chemical polish ror CdSe single crystals.