Calcium Tungstate (Calcium Tungsten Oxide) (CaWO4)-Powder

Characteristic




Scheelite is a calcium tungstate mineral with the chemical formula CaWO4. It is an important ore of tungsten (wolfram). Well-formed crystals are sought by collectors and are occasionally fashioned into gemstones when suitably free of flaws.




Formula：CaWO4

Strunz classification：7.GA.05

Crystal system：Tetragonal

Crystal class： Dipyramidal (4/m)   H-M symbol: (4/m)

Color：Colorless, white, gray, brown, pale yellow, yellow-orange, pale shades of orange, red, green; may be compositionally color zoned










Application




The material produced may be used to imitate diamond, as a scintillator, or as a solid-state lasing medium. It was also used in radium paint in the same fashion as was zinc sulphide, and Thomas Edison invented a fluoroscope with a calcium tungstate-coated screen, making the images six times brighter than those with barium platinocyanide