Without Solvent. The same procedure was used as
described in section a, except that no solvent was added.
The product was a light gray powder and represented a
mixture of NaCl and calcium tetrahydroaluminate according
to XRD data. Again, the tetrahydroaluminate was separated
from the chloride by Soxhlet extraction (12-16 h) using THF
as solvent. During extraction, which was slow, the solvent
adduct was formed. Hence, the calcium tetrahydroaluminate
could not be separated in a solvent-free form. Once obtained