Na1.89Ag0.11[BP2O7(OH)] und Na2[BP2O7(OH)] – Isotype Borophosphate mit 
Tetraeder-Schichtpaketen

Kniep, Rüdiger; Engelhardt, Holger

doi:10.1002/(SICI)1521-3749(199808)624:8<1291::AID-ZAAC1291>3.0.CO;2-R

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Na_1.89Ag_0.11[BP₂O₇(OH)] und Na₂[BP₂O₇(OH)] – Isotype Borophosphate mit Tetraeder-Schichtpaketen

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Kniep, R., & Engelhardt, H. (1998). Na_1.89Ag_0.11[BP₂O₇(OH)] und Na₂[BP₂O₇(OH)] – Isotype Borophosphate mit Tetraeder-Schichtpaketen. Zeitschrift für anorganische und allgemeine Chemie, 624(8), 1291-1297. doi:10.1002/(SICI)1521-3749(199808)624:8<1291:AID-ZAAC1291>3.0.CO;2-R.

Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-BE42-1

Abstract

The isotypic borophosphates Na1.89Ag0.11[BP2O7(OH)] and Na-2[BP2O7(OH)] were grown under mild hydrothermal conditions (T = 165-170 degrees C). The crystal structures were solved by single crystal methods in the case of Na1.89Ag0.11[BP2O7(OH)] and by refinement of powder data (Rietveld method) for Na-2[BP2O7(OH)], respectively (orthorhombic, Pna2(1) (No. 33); a = 683.98(14)/682.36(1) pm, b = 2086.5(4)/2079.11 (4) pm, c = 1318.9(3)/1314.46(3) pm; Z = 12). The compounds contain a complex two-dimensional structure consisting of layered tetrahedral blocks, which are formed by six- and eight-membered rings of tetrahedra. The Na+/Ag+-ions are located inside and near the surface of the 'layer blocks' and are five-, six- and sevenfold coordinated by oxygen.