Two New Occurrences and the Gibbs Energy of Burkeite

Lideke Vergouwen
Department of Soil Science and Geology, Agricultural University, PO Box 37, Wageningen, The Netherlands

Summary: Burkeite (Na6CO3(SO4)2) is found as a surface mineral in the north of Kenya associated with thenardite and halite and in the Konya basin in Turkey associated with trona and halite. The cell dimensions of a natural burkeite are a = 7.070, b = 9.220, c = 5.173 Å. The Gibbs energy of burkeite is estimated in relation to other sodium carbonates and sulphates. Δ ΔGf,298.15° (burkeite) = 3594.2 ± 3 kJ.

Mineralogical Magazine; September 1979 v. 43; no. 327; p. 341-345; DOI: 10.1180/minmag.1979.043.327.05
© 1979, The Mineralogical Society
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