The Habit of Pyrite in Some Sedimentary Rocks

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

Summary: Authigenic pyrite crystals or their pseudomorphs found in heavy residues from sedimentary rocks are cubes, octahedra, or pyritohedra. Combinations of these forms are common; trapezohedron and rhombic dodecahedron faces are rare. The cube is most often recorded in the literature, but the octahedron is dominant in some districts and may be favoured by calcareous environment. X-ray tests have been applied and goethite and hematite detected as alteration products.

Mineralogical Magazine; December 1956 v. 31; no. 235; p. 314-318; DOI: 10.1180/minmag.1956.031.235.06
© 1956, The Mineralogical Society
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