John Washington

Thank you Brian. I must have used PowerPoint to generate my figure 10 years ago as well then. Time fogs the memory. --John

Hello, I was wondering if you could answer my question on plotting in ACT2. I recently plotted log Al3+ vs pH to show the stability field for gibbsite. Then I added to the default thermodynamic dataset the equilibrium constants reported by Kirk Nordstrom for 'microcrystalline gibbsite' and 'amorphous Al(OH)3'. What I want to do is show all three mineral stability fields, each contained in the more stable field of the next. I am just returning to GWB after about 10 years; I did this with an earlier version of GWB I think but I don't see how to do this now. For the time being, I copy-pasted graphs in PowerPoint to achieve my end primitively -- I am pasting this below to show you what I want. Is there a more elegant way to generate this graph in GWB, showing all three solid phases, gibbsite, microcrystalline gibbsite, and amorphous Al(OH)3? Thanks very much for any advice, John

Hi Jia, You recently replied to my query to you, thank you. You suggested I try submitting a stream on the forum. I tried to start it, but did not know how to proceed -- I looked for instructions on using the forum, but did not find any. Here is the stream I tried to start -- I don't know what to do next. Any suggestions are appreciated. Thanks -- John