!!!! Ferrous and ferric

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https://www.lexico.com/en/definition/ferrosoferric  @@ Lexico: ferrosoferric
https://www.merriam-webster.com/dictionary/ferrosoferric @@ Merriam: ferrosoferric oxide
http://iron.atomistry.com/ferroso_ferric_chloride.html @@ Ferroso-ferric chloride, Fe3Cl8
https://www.lexico.com/en/definition/sideritic @@ Lexico: sideritic
https://www.lexico.com/en/definition/siderite @@ Lexico: siderite (ferrous carbonate; iron meteorite)