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Here are the plots for fit7 for the TIG parameters, k1_bondorder1 and k1_bondorder2 for each parameter
TIG0:
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TIG1c
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TIG1d
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TIG2
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TIG3
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TIG4
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TIG5a
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TIG5b
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TIG6
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TIG7
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TIG8
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TIG6, TIG7, TIG8 have gradients that vary on a large scale here.