Question: The perovskite NaOsO 3 undergoes a transition from a paramagnetic metal to an antiferromagnetic semiconductor upon cooling below 410 K. (a) What is the electron

The perovskite NaOsO3 undergoes a transition from a paramagnetic metal to an antiferromagnetic semiconductor upon cooling below 410 K.

(a) What is the electron configuration of osmium in this compound.

(b) Most perovskites containing ions with partially filled 5d orbitals are metals at all temperatures, what feature of NaOsO3 makes it different?

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