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crystal data
Lead diarsenate, Pb2As2O7, is triclinic, space group P. Unit-cell dimensions are: a = 6.86 ± 0.02, b = 7.13 ± 0.02, c = 12.93 ± 0.03 Å, α = 99°01′ ± 10′, β = 91°10′ + 12′, γ = 89°48′ ± 12′. Powder diffraction data are given.