[Pw_forum] Vacancy energy

[Phillip Nyawere]

Dear all,
I am doing vacancy calculation of a flouride but I am obtaining
positive energy for cation and negative energy for anion. The material is
barium floride.
Can someone help me understand this problem?
-- 
Phillip W. Otieno Nyawere,
Kabarak University,
P.O. Box Private Bag - 20157,
KABARAK
Nakuru Kenya
Tel +254728342054,
pnyawere at gmail.com, potieno at kabarak.ac.ke

God raises the meek from the ground and sits them with Kings.
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