Vanadium-Titanium-Bearing Mixed-Layered Clay from Potash Sulphur Springs, Arkansas

George R. McCormick
Department of Geology, The University of Iowa, Iowa City, IA 52242, U.S.A.

Abstract: A unique vanadium-titanium-bearing mixed-layered clay is currently being mined as an ore of vanadium at Potash Sulphur Springs, AR. The clay contains 80% expandable portion and has both a 14.22 and 18.24 Å hydration state in addition to the 9.49 Å dehydrated state; ethylene glycol expands this material to 16.69 Å. The 060 reflection for all hydration states is between 1.50 and 1.51 Å indicating the material is dioctahedral. The “mean chemical formula” calculates as (Ca0.08 K0.02 Na0.03)0.13 (Al0.11 V0.90 Ti0.19 Fe0.64 Mg0.14)1.98 (Si3.79 Al0.21)4 O10 (OH)2·nH2O.

Key Words: Mixed-layer • Titanium • Vanadium

Clays and Clay Minerals; April 1978 v. 26; no. 2; p. 93-100; DOI: 10.1346/CCMN.1978.0260203
© 1978, The Clay Minerals Society
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