X-ray Investigation of Zircon Crystals Containing Oh Groups

thoritc and, from the results of infra-red absorption spectra, concluded that this material contained (oH) groups; however, Mumpton and Roy (1961) in their experiments found no evidence in support of this substitution. rn the course of an extensive study of granitic pegmatites in yugoslavia, M. Risti6 and s. Pavlovi6 found in a pegmatite from prokuplje area, Serbia, zircon crystals associated with beryl, albite, muscovite and quartz. Subsequent investigations revealed the presence of 1.09/e uranium and0-09/6 thorium (determined by 7-racliometry) and a certain amount of water. Powder and single crystal photographs showed a certain degree of metamictization. AII of the investigation has been carried out with one group of zircon crystals ranging in size from 1 to 10 mm. Some of them had well developed faces, and the presence of the following forms was established: (010), (110)' (011)' (l2l) and (112). water was determined on a chevenard z