Hydrothermal synthesis and crystal structure of a new layeredphosphate, K2Co3(P2O7)2 · 2H2O

P. Lightfoot; A. K. Cheetham; A. W. Sleight

doi:10.1016/S0022-4596(05)80084-2

Hydrothermal synthesis and crystal structure of a new layeredphosphate, K₂Co₃(P₂O₇)₂ · 2H₂O

P. Lightfoot^*
, A. K. Cheetham
, A. W. Sleight

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

A novel pyrophosphate, K₂Co₃(P₂O₇)₂ · 2H₂O, has been synthesized by hydrothermal techniques and characterized by single crystal X-ray diffraction. Crystals suitable for structure determination were grown by slow cooling from 700°C under an external pressure of 3 kbar, though the phase may be synthesized in pure polycrystalline form under much milder conditions (220°C and 30 bar). The compound adopts the monoclinic space group P2₁/a with a = 9.229(2), b = 8.110(1), c = 9.122(4) Å, β = 99.31(4)°. The structure was solved by Patterson and Fourier methods, and refined to final agreement factors R = 0.023, R_w = 0.025. The structure has a layered nature, composed of cis-edge-sharing chains of CoO₆ octahedra running parallel to the b-direction, linked together by P₂O₇ groups to form two-dimensional sheets in the ab plane. Adjacent sheets are separated in the c-direction by potassium ions. The ammonium analog of the title compound has also been synthesized.

Original language	English
Pages (from-to)	275-282
Number of pages	8
Journal	Journal of Solid State Chemistry
Volume	85
Issue number	2
DOIs	https://doi.org/10.1016/S0022-4596(05)80084-2
Publication status	Published - 1 Jan 1990

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@article{d53a78e9e0554f8ea6deadfb186b19da,

title = "Hydrothermal synthesis and crystal structure of a new layeredphosphate, K2Co3(P2O7)2 · 2H2O",

abstract = "A novel pyrophosphate, K2Co3(P2O7)2 · 2H2O, has been synthesized by hydrothermal techniques and characterized by single crystal X-ray diffraction. Crystals suitable for structure determination were grown by slow cooling from 700°C under an external pressure of 3 kbar, though the phase may be synthesized in pure polycrystalline form under much milder conditions (220°C and 30 bar). The compound adopts the monoclinic space group P21/a with a = 9.229(2), b = 8.110(1), c = 9.122(4) {\AA}, β = 99.31(4)°. The structure was solved by Patterson and Fourier methods, and refined to final agreement factors R = 0.023, Rw = 0.025. The structure has a layered nature, composed of cis-edge-sharing chains of CoO6 octahedra running parallel to the b-direction, linked together by P2O7 groups to form two-dimensional sheets in the ab plane. Adjacent sheets are separated in the c-direction by potassium ions. The ammonium analog of the title compound has also been synthesized.",

author = "P. Lightfoot and Cheetham, \{A. K.\} and Sleight, \{A. W.\}",

year = "1990",

month = jan,

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doi = "10.1016/S0022-4596(05)80084-2",

language = "English",

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pages = "275--282",

journal = "Journal of Solid State Chemistry",

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T1 - Hydrothermal synthesis and crystal structure of a new layeredphosphate, K2Co3(P2O7)2 · 2H2O

AU - Lightfoot, P.

AU - Cheetham, A. K.

AU - Sleight, A. W.

PY - 1990/1/1

Y1 - 1990/1/1

N2 - A novel pyrophosphate, K2Co3(P2O7)2 · 2H2O, has been synthesized by hydrothermal techniques and characterized by single crystal X-ray diffraction. Crystals suitable for structure determination were grown by slow cooling from 700°C under an external pressure of 3 kbar, though the phase may be synthesized in pure polycrystalline form under much milder conditions (220°C and 30 bar). The compound adopts the monoclinic space group P21/a with a = 9.229(2), b = 8.110(1), c = 9.122(4) Å, β = 99.31(4)°. The structure was solved by Patterson and Fourier methods, and refined to final agreement factors R = 0.023, Rw = 0.025. The structure has a layered nature, composed of cis-edge-sharing chains of CoO6 octahedra running parallel to the b-direction, linked together by P2O7 groups to form two-dimensional sheets in the ab plane. Adjacent sheets are separated in the c-direction by potassium ions. The ammonium analog of the title compound has also been synthesized.

AB - A novel pyrophosphate, K2Co3(P2O7)2 · 2H2O, has been synthesized by hydrothermal techniques and characterized by single crystal X-ray diffraction. Crystals suitable for structure determination were grown by slow cooling from 700°C under an external pressure of 3 kbar, though the phase may be synthesized in pure polycrystalline form under much milder conditions (220°C and 30 bar). The compound adopts the monoclinic space group P21/a with a = 9.229(2), b = 8.110(1), c = 9.122(4) Å, β = 99.31(4)°. The structure was solved by Patterson and Fourier methods, and refined to final agreement factors R = 0.023, Rw = 0.025. The structure has a layered nature, composed of cis-edge-sharing chains of CoO6 octahedra running parallel to the b-direction, linked together by P2O7 groups to form two-dimensional sheets in the ab plane. Adjacent sheets are separated in the c-direction by potassium ions. The ammonium analog of the title compound has also been synthesized.

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U2 - 10.1016/S0022-4596(05)80084-2

DO - 10.1016/S0022-4596(05)80084-2

M3 - Article

AN - SCOPUS:0039166524

SN - 0022-4596

VL - 85

SP - 275

EP - 282

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

IS - 2

ER -

Hydrothermal synthesis and crystal structure of a new layeredphosphate, K₂Co₃(P₂O₇)₂ · 2H₂O

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