| 21. | In 1841, a chemist named Robert Oxland gave the first procedures for preparing tungsten trioxide and sodium tungstate.
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| 22. | "' Sodium tungstate "'is the inorganic compound with the formula Na 2 WO 4.
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| 23. | The structure of cubic zirconium tungstate consists of corner-sharing ZrO 6 octahedral and WO 4 tetrahedral structural units.
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| 24. | "' Russellite "'is a bismuth tungstate mineral with the chemical formula Bi 2 WO 6.
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| 25. | Zirconium tungstate has the unusual property of shrinking in all dimensions when heated, whereas most other substances expand when heated.
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| 26. | In this respect vanadium shows similarities to tungstate and molybdate, whereas chromium however has a more limited range of ions.
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| 27. | When high energy photons strike lead tungstate, they make it glow, or scintillate, and this glow can be measured.
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| 28. | "' Raspite "'is a mineral, a lead tungstate; with the dimorph of the tetragonal stolzite.
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| 29. | Double tungstates of the form A 2 B 2 ( WO 4 ) 3 are predicted to exist in the langbeinite form.
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| 30. | Predominance diagrams can become very complicated when many polymeric species can be formed, such as in vanadates, molybdates, and tungstates.
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