11. It forms a solid solution series with scheelite ( calcium tungstate , CaWO 4 ). 12. Ferberite is a black monoclinic mineral composed of iron ( II ) tungstate , O 4. 13. In aqueous solution, tungstate gives the heteropoly acids and polyoxometalate anions under neutral and acidic conditions. 14. Lead tungstate is extremely dense ( denser than iron ), stopping most photons that reach it. 15. Cadmium tungstate was used as a replacement of calcium tungstate in some fluoroscopes since 1940's. 16. Cadmium tungstate was used as a replacement of calcium tungstate in some fluoroscopes since 1940's. 17. These HIMS produce six streams of varying quality tungsten concentrate grading up to > 60 % tungstate . 18. Small additions of magnesium tungstate improved the blue part of the spectrum to yield an acceptable white light. 19. Generation 4 was characterized by the implementation of lead tungstate as the stabilizer in place of thallium sulfate. 20. Powellite ( calcium molybdate ) and scheelite ( calcium tungstate ) fluoresce intrinsically in yellow and blue, respectively.
