The compound, calcium tristannide, CaSn3, once
formed, is immediately decomposed by air at room
temperature. It has been observed to possess
a pronounced singularity of orbital magnetic susceptibility.
The degeneracy points of the electronic energy
bands close to the Fermi level are found to be responsible
for the anomalous diamagnetism in CaSn3 alloys.
The appearance and smearing of this anomaly with
temperature and impurities were analyzed, and corresponding
band structure and scattering parameters
were determined.This compound, in argon gas atmosphere,
melts congruently with:
DS melting (Ca0.25Sn0.75) = 14.6 + 0.1 J/mol degree;
Tmelting= 891±1 K
