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Abstract. In this work we investigated the behaviour of pure HgS during extraction with dilute HCl to establish its extractability in 1 and 6M HCl at the concentration level close to those occurring in natural sediments and soils. We found that neither cinnabar nor metacinnabar were soluble in 1M HCl, whereas both were partially extracted by 6M HCl. Metacinnabar precipitated in the laboratory was...
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