Abstract
[88Bat] redetermined the crystal structure of Li2FeS 2 denoted x in thisreview. It has hexagonal symmetry with the space group P3ml, a = 0.3902, and c = 0.6294 nm. The structure consists of cph layers of S with Fe and Li filling the tetrahedral and octahedral interstices. Using electrochemical measurements, [86Sch] determined an isothermal section for this system at 400 ~ this section is 9 redrawn in Fig. 1. The ternary compound x shows a significant range of homogeneity with respect of the Li content. It forms tie lines with (o.Fe), Fe 1 _x S, FeS 2, and Li2S. Another study of phase equilibria in the range of 350 to 550 ~ was conducted using the same technique by [87Wen], a reference that is not available to this reviewer.
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