Abstract
The “Zwischenprodukt” of Schneiderhöhn and Ramdohr (1931) has been identified in samples from Cerro de Pasco and Cobriza, Peru, associated with hexagonal pyrrhotite and pyrite-marcasite. A temperature of formation of less than 300°C, and possibly as low as 25°C, is indicated by the occurrence in these two deposits. Electron microprobe analysis yields 44.6 percent Fe and 52.5 percent S. No other elements were detected, suggesting the presence of 2.9 percent of some light element or combination of light elements.
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