 Hence, its formula is sometimes represented with the formula (AlH3)n. Alane forms numerous polymorphs, which are named α-alane, α’-alane, β-alane, γ-alane, δ-alane, ε-alane and ζ-alane.α-Alane has a cubic or rhombohedral morphology, whereas α’-alane forms needle-like crystals and γ-alane forms a bundle of fused needles.Alane is soluble in THF and ether.