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200517.fm Page 5 Friday, March 18, 2005 2:52 PM
2005
Structure
D 2000
17- 005
Synthesis and Investigation of Tin(II) Pyrophosphate Sn2P2O7. — The title compound is prepared by heating a stoichiometric mixture of SnO and NH4H2PO 4 at 820 K
for 24 h and characterized by single crystal and powder XRD, and 119Sn Moessbauer
spectroscopy. The low-temperature β-modification crystallizes in the triclinic space
group P1 with Z = 4. The structure contains [P2O7]4- groups oriented in mutually perpendicular directions with Sn atoms situated in large structural interstices. The title
compound undergoes a structural transition at 623 K. The high-temperature α-form
crystallizes in the monoclinic space group P21/n with Z = 2. — (CHERNAYA, V. V.;
MITIAEV, A. S.; CHIZHOV, P. S.; DIKAREV, E. V.; SHPANCHENKO*, R. V.;
ANTIPOV, E. V.; KOROLENKO, M. V.; FABRITCHNYI, P. B.; Chem. Mater. 17
(2005) 2, 284-290; Dep. Chem., Moscow State Univ., Moscow 119889, Russia; Eng.)
— W. Pewestorf
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