Synthesis and Crystal Structure of AlH₂P₃O₁₀×2H₂O; a New Structure‐Type for Layered Acid Phosphates.

Abstract

Structure D 2000Synthesis and Crystal Structure of AlH 2 P 3 O 10 ·2H 2 O; a New Structure-Type for Layered Acid Phosphates. -The title compound is synthesized from a phosphoric acid flux reaction starting with H3PO4 and Al2O3 in a molar ratio of P:Al = 6:1 (240°C, 24 h). AlH2P3O10·2H2O crystallizes in the monoclinic space group P2/c with Z = 2 (single crystal XRD) and represents a new structure-type for the layered compounds MH 2 P 3 O 10 ·nH 2 O (M: Ga, Fe, Mn, V, Cr). The structure contains two-dimensional layers of H2P3 units, providing octahedral coordination to the Al 3+ ions. AlH2P3O10 has already commercial applications as an environmentally-friendly anticorrosion pigment in paints and coatings for metal surfaces and as an adsorbent. -(RISHI, S. K.; KARIUKI, B. M.; CHECKER, N. J.; GODBER, J.; WRIGHT*, A. J.; Chem.