TY - JOUR
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.
UR - http://www.scopus.com/inward/record.url?scp=0039166524&partnerID=8YFLogxK
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 -