Dickite from Sandstones in Northern England and North Wales

Frank Smithson and George Brown
University College of North Wales, Bangor
Rothamsted Experimental Station, Harpenden

Summary: The occurrence of dickite as a rock-forming mineral in sandstones of the Lower Carboniferous Series, the Millstone Grit, and the Middle Jurassic has been reported previously by the authors. In view of the paucity of data on this mineral, six samples were purified and examined optically, by staining tests, and by the X-ray powder method. In addition, a chemical analysis, a differential thermal analysis, and a thermal weight-loss curve were made on the purest sample. The investigations confirm the identity of the material.

Mineralogical Magazine; March 1957 v. 31; no. 236; p. 381-391; DOI: 10.1180/minmag.1957.031.236.05
© 1957, The Mineralogical Society
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