The Mn, Mg-intracrystalline exchange reaction in donpeacorite (Mn0.54Ca0.03Mg1.43Si2O6) and its relation to the fractionation behavior of Mn in Fe, Mg-orthopyroxene by Marilena Stimpfl (2005, vol. 90, p. 155–161, DOI: 10.2138/am.2005.444).

Equations 4 and 5 on page 159 have a sign error. The correction equations are:

 
\[ln\ \mathit{k_{D}}\ =\ {-}\frac{2708({\pm}58)}{\mathit{T}(K)}\ +\ 0.695({\pm}0.058){\ }(\mathit{R}^{2}\ =\ 100\%)\]
(4)
...
 
\[ln\ \mathit{k}_{D}\ =\ {-}\frac{2984({\pm}64)}{\mathit{T}(K)}\ +\ 0.747({\pm}0.078){\ }(\mathit{R}^{2}\ =\ 99\%)\]
(5)
...

The author regrets this error.

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