RESUMO
The structure of the title compound, (Ag(0.79)Co(0.11))Co(H(2)O)(2)[BP(2)O(8)]·0.67H(2)O is isotypic to that of its recently published counterparts AgMg(H(2)O)(2)[BP(2)O(8)]·H(2)O and (Ag(0.57)Ni(0.22))Ni(H(2)O)(2)[BP(2)O(8)]·0.67H(2)O. It consists of infinite borophos-phate helical ribbons [BP(2)O(8)](3-), built up from alternate BO(4) and PO(4) tetra-hedra arranged around the 6(5) screw axes. The vertex-sharing BO(4) and PO(4) tetra-hedra form a spiral ribbon of four-membred rings in which BO(4) and PO(4) groups alternate. The ribbons are connected through slightly distorted CoO(4)(H(2)O)(2) octa-hedra whose four O atoms belong to the phosphate groups. The resulting three-dimensional framework is characterized by hexa-gonal channels running along [001] in which the remaining water mol-ecules are located. The main difference between the Mg-containing and the title structure lies in the filling ratio of Wyckoff positions 6a and 6b in the tunnels. The refinement of the occupancy rate of the site 6a shows that it is occupied by water at 67%, while the refinement of that of the site 6b shows that this site is partially occupied by 78.4% Ag and 10.8% Co, for a total of 82.2%. The structure is stabilized by O-Hâ¯O hydrogen bonds between water mol-ecules and O atoms that are part of the helices.
RESUMO
The structure framework of the title compound, (Ag(0.57)Ni(0.22))Ni(H(2)O)(2)[BP(2)O(8)]·0.67H(2)O, is the same as that of its recently published counterpart AgMg(H(2)O)(2)[BP(2)O(8)]·H(2)O. In the title structure, the Ag, Ni, B and one O atom are located on special positions (sites symmetry 2). The structure consists of infinite borophosphate helical [BP(2)O(8)](3-) ribbons, built up from alternate BO(4) and PO(4) tetra-hedra arranged around the 6(5) screw axes. The vertex-sharing BO(4) and PO(4) tetra-hedra form a spiral ribbon of four-membered rings in which BO(4) and PO(4) groups alternate. The ribbons are connected through slightly distorted NiO(4)(H(2)O)(2) octa-hedra, four O atoms of which belong to the phosphate groups. The resulting three-dimensional framework is characterized by hexa-gonal channels running along [001]. However, the main difference between the structures of these two compounds lies in the filling ratio of Wyckoff positions 6a and 6b in the tunnels. Indeed, in this work, the refinement of the occupancy rate of sites 6a and 6b shows that the first is occupied by water at 67% and the second is partially occupied by 56.6% of Ag and 21.6% of Ni. In the AgMg(H(2)O)(2)[BP(2)O(8)]·H(2)O structure, these two sites are completely occupied by H(2)O and Ag(+), respectively. The title structure is stabilized by O-Hâ¯O hydrogen bonds between water mol-ecules and O atoms that are part of the helices.
RESUMO
The structure of In(0.51)Fe(0.49)LiP(2)O(7) consists of a three-dimensional network constructed from (In(III)/Fe(III))O(6) octa-hedra and P(2)O(7) groups. Each M(III)O(6) octa-hedron is linked to six PO(4) tetra-hedra belonging to five different P(2)O(7) groups and shares two corners with the same P(2)O(7) group so as to build infinite chains or rather parallel colums of [M(III)P(2)O(11)] running along the a axis. The linkage between these chains or columns defines hepta-gonal tunnels parallel to [100] in which the Li(+) ions are located in off-centred positions. The In(0.51)Fe(0.49)LiP(2)O(7) compound can be regarded as one composition of the continuous solid solution between LiFeP(2)O(7) and LiInP(2)O(7) whose structure is isotypic with the A(I)FeP(2)O(7) (A(I) = Na, K, Rb, Cs and Ag) diphosphate family.
RESUMO
The title compound contains infinite one-dimensional [BP(2)O(8)](3-) borophosphate helical ribbons, built up from alternate BO(4) and PO(4) tetra-hedra arranged around the 6(5) screw axes. The vertex-sharing BO(4) and PO(4) tetra-hedra form a spiral ribbon of four-membered rings in which BO(4) and PO(4) groups alternate. The ribbons are connected through slightly distorted MgO(4)(H(2)O)(2) octa-hedra, in which the four O atoms belong to the phosphate groups. The free threads of the helices are occupied by silver ions, which are in an irregular environment surrounded by six O atoms. The central channels of the helices, running along the c axis, are filled with the water mol-ecules. The structure is stabilized by O-Hâ¯O hydrogen bonds between the water mol-ecules and O atoms that are part of the helices. The crystal structure of the title compound is isotopic with other analogous borophosphates such as A(I)M(II)(H(2)O)(2)[BP(2)O(8)]·H(2)O, where A(I) = Li, Na, K or NH(4) (+) and M(II) = Mg, Mn, Fe, Co, Ni, Cu, Zn or Cd.
RESUMO
Polycrystalline material of the title compound, AgInP(2)O(7), was synthesized by traditional high-temperature solid-state methods and single crystals were grown from the melt of a mixture of AgInP(2)O(7) and B(2)O(3) as flux in a platinium crucible. The structure consists of InO(6) octa-hedra, which are corner-shared to PO(4) tetra-hedra into a three-dimensional network with hexa-gonal channels running parallel to the c axis. The silver cation, located in the channel, is bonded to seven O atoms of the [InP(2)O(7)] framework with Ag-O distances ranging from 2.370â (2) to 3.015â (2)â Å. The P(2)O(7) diphosphate anion is characterized by a P-O-P angle of 137.27â (9) and a nearly eclipsed conformation. AgInP(2)O(7) is isotypic with the M(I)FeP(2)O(7) (M(I) = Na, K, Rb, Cs and Ag) diphosphate family.
