Molybdates and Tungstates

The molybdates and tungstates are compounds of metallic elements with the molybdate and tungstate radicals, respectively. These minerals as a rule are heavy, soft, brittle, and dark or vividly colored. Chesterman, p. 495

# Sources[edit]

* Chesterman, Charles W. The Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf: New York (1987)