Cryst. Res. Technol. 36 2001 4-5 465-470 Pyrophosphate doped KDP crystal was grown from aqueous solution by the temperature lowering method. Light scatter in KDP crystal was detected with an ultramicroscopic method. It has been proved that light scatter in KDP crystal aggravated when pyrophosphate was doped into the growth solution, which distributed non-uniformly in prism and pyramidal sectors of the KDP crystal. The different effects of pyrophosphate on prism and pyramidal sector of KDP crystals can explain this case. The method of eliminating light scatter in pyrophosphate doped KDP crystal is discussed.
Study on characteristics and formation mechanism of inland saline water is conducive to develop and utilizing saline water resources scientifically and reasonably. Taking alluvial plain of the Yellow River in the Northwest of Shandong as an example, based on experimental data, chemical composition and spatiotemporal variation characteristics of inland saline groundwater are discussed and its formation mechanism is revealed. Result shows old interchannel belt, sullen water flow, high evaporation and different hydro-geochemistry functions are formation conditions of high salinity saline water in inland area. From the mainstream of old channel to saline water area of interchannel belt, groundwater hydro-chemistry type by HCO3- evolves into the Cl.SO4 -Mg.Na.Ca type and Cl.SO4-Na.Mg.Ca type gradually.Thus, improving measures such as pumping saline water in non-flood season and treating water with reverse osmosis material and so on are put forward to make the saline water evolve into fresh water.
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