wavellite


From The Collaborative International Dictionary of English v.0.48:

Wavellite \Wa"vel*lite\, n. [After Dr. Wm. Wavel, the
   discoverer.] (Min.)
   A hydrous phosphate of alumina, occurring usually in
   hemispherical radiated forms varying in color from white to
   yellow, green, or black.
   [1913 Webster]
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