Hello, I`d like to ask if there any free plugins for Excel (MS Office) or Calc that facilitates drawing this type of charts (Tenary, Stiff, Piper, etc. - typical for hydrogeochemistry/geochemistry)? I`ve heard recently that importing them to Excel gives almost that same range of hydrogeochemical data visualisation like that one avaliable in AqQA software (by Rockware), but for free. Usually I use Grapher (when making some geochemistry charts), but I`d like also to know if anybody uses MS Excel hydrogeochemical data visualisation plugins for the same purpose?

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