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This article in SSSAJ

  1. Vol. 43 No. 1, p. 188-191
    Received: Mar 27, 1978
    Accepted: Aug 31, 1978

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Increased Selectivity of Naturally Weathered Biotites for Potassium1

  1. J. G. Tarzi and
  2. R. Protz2



Mica particles from six residual soils were separated from different horizons and separated into three weathering classes. Potassium contents in the centers and in the edges of mica particles were determined by using electron probe microanalysis techniques. The results showed that biotites tended to regain K after an initial loss becoming more resistant to weathering. The regained K concentrated at the edges of weathered biotite particles.

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