With DEE. A 2.27 g sample of CaCl2 (20 mmol) and
2.18 g of NaAlH4 (40 mmol), together with 5 mL of DEE
and 10 silicon nitride balls with a total weight of 42 g, were
filled into the milling vial and sealed under an argon
atmosphere (ball-to-powder ratio 10:1). The mixture was
milled for 14 cycles, each cycle consisting of 15 min ball
milling at 600 rpm and a subsequent intermission of 5 min.
The direction of rotation was reversed after each cycle. A
light gray powder was obtained as the reaction product. It
was extracted for 12-16 h using a Soxhlet apparatus with
DEE as solvent