Table 4.

Crystallographic data of K-alanates.

Compound	Space Group, Cell Dimensions [Å] and Angles [°]	Atomic Coordinates
KAlD4	(Pnma) No. 62 [173] a = 8.8514(14); b = 5.8119(8); c = 7.3457(11) α = β = γ = 90	K: 0.1839(12), ¼, 0.1522(17) Al: 0.5578(11), ¼, 0.8209(13) D1: 0.4018(10), ¼, 0.9156(9) D2: 0.7050(9), ¼, 0.9630(12) D3: 0.4209(6), 0.9741(8), 0.3098(7)
α-K3AlH6	(P 21/c) No. 14 [175] a = 6.1771; b = 5.8881; c = 8.6431 α = 90; β = 89.3, γ = 90	K1: 0, 0, ½ K2: −0.0058, 0.4828, 0.2544 Al: 0, 0, 0 H1: 0.0617, 0.0089, 0.2042 H2: 0.2799, 0.3136, 0.5349 H3: 0.1786, 0.2281, 0.9652
β-K3AlH6	(I 4/mmm) No. 139 [175] a = b = 4.4441; c = 7.8098 α = β = γ = 90	K1: 0, 0, ½ K2: 0, ½, ¼ Al1: 0, 0, 0 H1: 0, 0, 0.2128 H2: 0.3429, 0, 0
γ-K3AlH6	(Pnnm) No. 58 [175] a = 10.8885; b = 10.2576; c = 2.5538 α = β = γ = 90	K1: 0.2347, 0.03444, 0 K2: 0.55047, ¾, 0 K3: 0.691, 0.2178, 0 Al1: ½, ½, 0 Al2: 0, ½, 0 H1: 0.9388, 0.0715, 0 H2: 0.5928, 0.3931, 0 H3: 0.3085, 0.3814, 0 H4: 0.0632, 0.3708, 0 H5: 0.4194, 0.0352, 0 H6: 0.8387, 0.3512, 0