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Na8[Cr4B12P8O44(OH)4][P2O7]⋅nH2O: A 3D Borophosphate Framework with Spherical Cages

“…is a lB dreier framework constructed by the fundamental building unit of 4&: < 3& > &, [11] whereas A- [7] Thermal stability and microporosity: Figure 4 shows the TGA curves for 1 under different conditions. As-synthesized 1 exhibits two major weight losses.…”

“…Thus, the framework structures of borophosphates known so far can be derived from a few typical borophosphate FBUs. This description reveals that most of the borophosphate partial structures are low dimensional, with only two exceptional 3D cases, M I A C H T U N G T R E N N U N G [B 2 P 2 O 8 (OH)] (M I = Rb, Cs) [11] and AA C H T U N G T R E N N U N G [BeBP 2 O 8 ]·nH 2 O (A= Na + , K + , NH 4 + ). [7] Nevertheless, to describe the complete framework, one has to include the polyhedra of metal atoms, in particular, the octahedra and tetrahedra.…”

Materials directed to implants for repairing Central Nervous System

“…There are several processes to reduce TiO 2 like electrochemical reduction, mechanochemical or carbothermal (79)(80)(81)(82)(83)(84). But the main process to obtain the Magnéli phases, is by reduction from TiO 2 in thermal treatment at temperatures higher than 1000 ºC and in low-oxygen containing atmospheres, as H 2 (76,85,86).…”

Oligomere Tetraeder-Anionen in Borophosphaten: Darstellung und Kristall­strukturen von NaFe[BP2O7(OH)3] und K2Fe2[B2P4O16(OH)2 ]/Oligomeric Tetrahedral Anions in Borophosphates: Synthesis and Crystal Structures of NaFe[BP2O7(OH)3] and K2Fe2[B2P4O16(OH)2]

“…K H P 04 und 1. 5 Sauerstoffatome der Borat-Tetraeder werden durch gen zwischen den 02-A tom en der Phosphat-TetraProtonen (05-H1 = 70 (5) [9], die Eisen-Sauerstoff-Oktaeder sind dabei bezüglich der Bindungs abstände und -winkel stärker verzerrt als in der NaVerbindung. Der lange Abstand in axialer Richtung Fe(III)-07 von 207.8(2) pm führt zur OH-Funktion des Borat-Tetraeders (Abb.…”

“…Das Spektrum reicht heute von Kettenstrukturen [2] über Schich tenverbände [3,4] bis zu dreidimensional vernetzten Teilstrukturen [5]. Ein dimeres Borophosphat-Tetraederanion liegt im Mineral Lüneburgit [6 ] vor.…”