[cig-commits] [commit] add_thermodynamic_potentials: Minor bug fix (78cf89e)

[cig_noreply at geodynamics.org]

Repository : https://github.com/geodynamics/burnman

On branch  : add_thermodynamic_potentials
Link       : https://github.com/geodynamics/burnman/compare/2e5646d93cedbbf8eae54cc37cffc14e0aa85180...d5ddad03ff9f30f5a4efaddb4e3ec585ea1a7c51

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commit 78cf89effd2e6108dc56d5af8a1ca14a3bc08233
Author: Bob Myhill <myhill.bob at gmail.com>
Date:   Wed Sep 3 02:37:07 2014 +0200

    Minor bug fix


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78cf89effd2e6108dc56d5af8a1ca14a3bc08233
 burnman/solutionmodel.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/burnman/solutionmodel.py b/burnman/solutionmodel.py
index ad4557f..a39bce1 100644
--- a/burnman/solutionmodel.py
+++ b/burnman/solutionmodel.py
@@ -101,7 +101,7 @@ class IdealSolution ( SolutionModel ):
                                      molar_fractions[i] * R * np.log(activities[i])
 
     def  ideal_gibbs_excess( self, temperature, molar_fractions ): 
-        return temperature*configurational_entropy(molar_fractions)
+        return 0.0 - temperature*configurational_entropy(molar_fractions)
 
     def ideal_activities ( self, molar_fractions ):