[Wien] Heusler alloys

[Gerhard Fecher]

Dear Stefan
The electrons of a closed d^10 (or f^14) valence shell behave in the magnetic case
like a core-level, that is they do not contribute to the magnetic moment,
therefore they do not enter the electron count in the Slater-Pauling rule.
The Slater Pauling rule is valid if you have systems were the different atoms in the primitive cell
behave like a mean average atom with a mean average number of valece and d-electrons being responsible
for the magnetic moment.
Attention: that was a very short explanation !!!!!

However, there may be critical cases when you have in the solid e.g. a d^9.5 state 
instead of d^10. But mostly such compounds will not follow the Slater-Pauling rule either.

Ciao
Gerhard

Question was:
For Co2SiSn it is similar, but Sn has 2x5p + 2x5s  (for some reason the 
10x4d are not considered -- I don't  know the physics of your problem).


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