Thermolysis features of manganese(II) and zinc dihydrogenphosphate solid solution

Advanced Synthesis and 3D-AFM-Structural Features of Mono-Metalized Cyclotetraphosphates

“…The most intense reflection pear of IRspectra are assigned by red cycles as clear in Figure 2. It is well known that the Co 2 P 4 O 12 structure is mainly characterized by a three-dimensional framework with MO 6 (M = Co) polyhedral linkedwith P 4 O 12 ringsby M-O-P. The basic structure unit is the centrosymmetriccyclotetraphosphatering P 4 2− radical and theP-O-P bridge which differ in their bond strength and as result multi-splitting processes are occurred as shown in Figure. 2− radical show itsasymmetric and symmetric stretching frequencies around 1327 -1237and 1150-1000 cm −1 , respectively.…”

“…As one of the members of phosphate material family, transition metal cyclotetraphosphate micro-/nanoparticles can be usedin potential pigments, selective catalysts, phosphors, materials for corrosion-resistant coatings and biocompartible and biodegradable intissue [5][6][7][8]. Several divalent including 3d metals, namely, Mn, Co, Fe, Zn, Cu, and Ni, are known to form the singlemetal cyclotetraphosphate M 2 P 4 O 12 , where M (II) stands for a divalent metal.…”

“…In this geometry each phosphate tetrahedronshares 2 oxygen atoms with its neighbour, giving an O/P ratio of 3: 1. Ultraphosphates, in contrast to polyphosphates and cyclic phosphates, are branched: meaning the anionic unit contains phosphate tetrahedra that share 3 of their oxygen atoms, which can form various different geometries such as threedimensional networks, infinite ribbons and layers, [6] or finite groups.…”

“…All these compounds have similarX-ray diffraction patterns and close unit cell parameters, which crystallize in monoclinic space group C2/c (Z=4) [12]. Various methods have been employed to synthesize binary metal cyclotetraphosphates, including two-Features of Mono-Metalized Cyclotetraphosphates step thermal method [5][6][7][8], hydrothermal synthesis [5] and the decomposition of binary metal (II) dihydrogenphosphates (M1−yAy (H2PO 4 ) 2 nH2O; whereMand A=Ca, Mg, Mn, Fe, Co, Ni, Cu or Zn; y=0-1; n=1-4) [9][10][11]. This work is of interest because it appears economically advantageous to replace partially the divalent metal cations by some cheaper divalent element which could also improve special properties as above mentioned [1][2][3][4].…”

“…Several divalent including 3d metals, namely, Mn, Co, Fe, Zn, Cu, and Ni, are known to form the singlemetal cyclotetraphosphate M 2 P 4 O 12 , where M (II) stands for a divalent metal. The binary metal cyclotetraphosphates M 2−x A x P 4 O 12 (M and A=Mg, Ca, Mn, Co, Ni, Zn, or Cu; x=0-2), isostructural with the single metal cyclotetraphosphates M 2 P 4 O 12 , were prepared by Trojan et al [5][6][7][8] and Boonchomet al [9][10][11]. All these compounds have similarX-ray diffraction patterns and close unit cell parameters, which crystallize in monoclinic space group C2/c (Z=4) [12].…”