Données cristallographiques sur un phosphobéryllate d'ammonium: Be₂P₃O₁₀NH₄

Ammonium phosphoberyllate, Be₂P₃O₁₀NH₄, is monoclinic with a unit cell a = 12.200 (8), b = 8.645 (3), c = 8.937 (3) Å, β = 117.40 (5)° and Z = 4. Possible space groups are Cc or C2/c. The chemical preparation and crystal data are given for this new compound.