Darstellung und Kristallstruktur von Cs8P8O24 · 8H2O

Brühne, Birke; Jansen, Martin

doi:10.1002/zaac.19936190921

Cited by 3 publications

(1 citation statement)

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“…Numerous caesium phosphates have been completely structurally characterized so far, viz. the low-temperature form of Cs 3 (PO 4 ) [6], Cs 2 (HPO 4 )(H 2 O) 2 [7], Cs(H 2 PO 4 ) in its low-and room-temperature forms [8][9][10], as a superprotonic conductor phase [11] and in its high-pressure forms [12], CsH 5 (PO 4 ) 2 [13], Cs(H 3 P 2 O 7 )(H 2 O) [14], Cs 2 (H 2 P 2 O 7 ) [15], Cs 6 (P 6 O 18 )(H 2 O) 6 [16], Cs 3 (P 3 O 9 )(H 2 O) [17], Cs 4 (P 4 O 12 )(H 2 O) 4 [18], and Cs 8 (P 8 O 24 )(H 2 O) 8 [19].…”

Section: Introductionmentioning

confidence: 99%

The caesium phosphates Cs3(H1.5PO4)2(H2O)2, Cs3(H1.5PO4)2, Cs4P2O7(H2O)4, and CsPO3

Weil

Stöger

2020

Monatsh Chem

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The caesium phosphates Cs3(H1.5PO4)2(H2O)2 and Cs3(H1.5PO4)2 were obtained from aqueous solutions, and Cs4P2O7(H2O)4 and CsPO3 from solid state reactions, respectively. Cs3(H1.5PO4)2, Cs4P2O7(H2O)4, and CsPO3 were fully structurally characterized for the first time on basis of single-crystal X-ray diffraction data recorded at − 173 °C. Monoclinic Cs3(H1.5PO4)2 (Z = 2, C2/m) represents a new structure type and comprises hydrogen phosphate groups involved in the formation of a strong non-symmetrical hydrogen bond (accompanied by a disordered H atom over a twofold rotation axis) and a very strong symmetric hydrogen bond (with the H atom situated on an inversion centre) with symmetry-related neighbouring anions. Triclinic Cs4P2O7(H2O)4 (Z = 2, P$$\bar{1}$$ 1 ¯ ) crystallizes also in a new structure type and is represented by a diphosphate group with a P–O–P bridging angle of 128.5°. Although H atoms of the water molecules were not modelled, O···O distances point to hydrogen bonds of medium strengths in the crystal structure. CsPO3 is monoclinic (Z = 4, P21/n) and belongs to the family of catena-polyphosphates (MPO3)n with a repetition period of 2. It is isotypic with the room-temperature modification of RbPO3. The crystal structure of Cs3(H1.5PO4)2(H2O)2 was re-evaluated on the basis of single-crystal X-ray diffraction data at − 173 °C, revealing that two adjacent hydrogen phosphate anions are connected by a very strong and non-symmetrical hydrogen bond, in contrast to the previously described symmetrical bonding situation derived from room temperature X-ray diffraction data. In the four title crystal structures, coordination numbers of the caesium cations range from 7 to 12. Graphic abstract

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Section: Introductionmentioning

confidence: 99%

The caesium phosphates Cs3(H1.5PO4)2(H2O)2, Cs3(H1.5PO4)2, Cs4P2O7(H2O)4, and CsPO3

Weil

Stöger

2020

Monatsh Chem

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ChemInform Abstract: Synthesis and Crystal Structure of Cs8P8O24×8 H2O.

Bruehne

Jansen

1993

ChemInform

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Synthesis and Crystal Structure of Cs8P8O24·8 H2O. -The title compound is prepared from Na8P8O24·6 H2O by cation exchange and single crystals are grown by the gel technique. The compound, crystallizing in the space group P1 with Z = 1, is built-up from cyclic P8O8-24 anions (having chair conformation along the xy plane) with point symmetry C2h linked by CsO8 and CsO10 polyhedra, resp., thus forming a 3-dimensional framework. Additionally hydrogen bonds exist between water molecules and terminal oxygen atoms of the phosphate anions. -(BRUEHNE, B.; JANSEN, M.; Z. Anorg. Allg.

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Vapor pressure and specific electrical conductivity in the solid and molten H2O-CsH2PO4-CsPO3 system—a novel electrolyte for water electrolysis at ~ 225–400 °C

Nikiforov

Berg

Bjerrum

2018

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Darstellung und Kristallstruktur von Cs₈P₈O₂₄ · 8H₂O

Cited by 3 publications

References 12 publications

The caesium phosphates Cs3(H1.5PO4)2(H2O)2, Cs3(H1.5PO4)2, Cs4P2O7(H2O)4, and CsPO3

The caesium phosphates Cs3(H1.5PO4)2(H2O)2, Cs3(H1.5PO4)2, Cs4P2O7(H2O)4, and CsPO3

ChemInform Abstract: Synthesis and Crystal Structure of Cs8P8O24×8 H2O.

Vapor pressure and specific electrical conductivity in the solid and molten H2O-CsH2PO4-CsPO3 system—a novel electrolyte for water electrolysis at ~ 225–400 °C

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