Abstract (NH4)2Be4Cl10 crystallizes in the cubic space group Fd[unk]m(Z = 8) with a = 14.705(3) Å, D rö = 1.784 g/cm3. The structure was solved from 111 symmetry independent reflections and refined to R = 0.030. The structure is characterised by [Be4Cl10]2−-units, analogous to P4O10, held together by the [NH4]+-ions. The compounds A2Be4Cl10 with A = Cs, Rb, K, Tl are isotypic.
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A 1994 study studied this question.
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