Mg. Aylmore et Fj. Lincoln, Mechanochemical milling-induced reactions between gases and sulfide minerals: II. Reactions of CO2 with arsenopyrite, pyrrhotite and pyrite, J ALLOY COM, 314(1-2), 2001, pp. 103-113
X-ray diffractometry, scanning electron microscopy and mass spectrometry ha
ve been utilised to study mechanochemical milling of arsenopyrite. pyrite a
nd pyrrhotite, separately, in the presence CO2 gas. Arsenopyrite alters to
the iron arsenide phase, westerveldite, through an intermediate arsenopyrit
e-type phase and pyrite decomposes to pyrrhotite, which appears to be stabl
e in CO2, although it does undergo a phase transformation to the hexagonal
form. (C) 2001 Elsevier Science B.V. All rights reserved.