Safflorite

Safflorite

Safflorite is a mineral that forms as a result of the siderophillic character of certain elements, such as cobalt and iron, combining with arsenic to create (Co,Fe)As2. It is one of several Co and Ni minerals found in mineralogically complex deposits, including cobaltite, glaucodot, and ullmanite-willyamite.From: Trace Elements in Abiotic and Biotic Environments [2015], Controls on cobalt and nickel distribution in hydrothermal sulphide deposits in Bergslagen, Sweden - constraints from solubility modelling [2020]

Co, 27]

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Published in Alina Kabata-Pendias, Barbara Szteke, Trace Elements in Abiotic and Biotic Environments, 2015

Alina Kabata-Pendias, Barbara Szteke

Cobalt occurs mainly at +2 oxidation state, but also at +3 and +4. Its geochemical behavior is similar to Fe and Mn. Due to its siderophillic character, it is likely to form minerals with S and As, such as linnelite, Co3S4; smaltite, Co(Ni)As3; cobaltite, CoAsS; arsenosulfide, CoAsS; and safflorite, (Co,Fe)As2. In hypergenic zones and in soils, it may occur as erythrite, Co2(AsO4)2·8H2O. Oxides of Mn, both abiogenic and biogenic origins, reveal a great capacity to absorb Co.

Controls on cobalt and nickel distribution in hydrothermal sulphide deposits in Bergslagen, Sweden - constraints from solubility modelling

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Published in GFF, 2020

Nils F. Jansson, Weihua Liu

Many marble- and skarn-hosted Cu sulphide deposits in the Bergslagen mining district in Sweden contain minor or accessory minerals of Co and locally of Ni. Classic examples include the Håkansboda and Tunaberg deposits (Tegengren 1924), both of which occur in dolomitic marble carrying abundant magnesian calc-silicates, magnetite and calcite near mineralization. These deposits are mineralogically complex and contain numerous Co and Ni minerals including cobaltite (CoAsS), glaucodot ((Co,Fe)AsS), ullmanite-willyamite (NiSbS-CoSbS), safflorite ((Co,Fe)As2), costibite (CoSbS), cobaltpentlandite (Co9S8), nickeline (NiAs), breithauptite (NiSb), kallilite (Ni(Sb,Bi)S), nisbite (NiSb2), kieftite (CoSb3) and oenite (CoSbAs) (Carlon & Bleeker 1988; Dobbe 1992, 1994; Dobbe et al. 1994; Dobbe & Zakrzewski 1998).

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Co, 27]

Controls on cobalt and nickel distribution in hydrothermal sulphide deposits in Bergslagen, Sweden - constraints from solubility modelling