Аннотация:The x-ray crystal structure of magnesium tetraphosphate MgP 4 O 11
obtained in the system MgO-ZnO-P 2 O 5-H 2 O at 400 C is solved (automated
diffractometer, 2216 reflections, 2θ/θ-scanning, λ Mo Kα, sin θ/λ≤ 1.08 Å− 1, R= 0.0648, R
w= 0.0587, s= 2.37) in the pseudocell with parameters a= 9.670 (5), b'= b/3= 11.758 (7), c=
14.521 (8) Å, space group Pmc2 1, Z= 8, ρ calc= 2.61 g/cm 3. The crystal chemical features
of MgP 4 O 11 include a novel type of ultraphosphoric acid radical, a bulky network of 6- ...