Acta Cryst. (2005). E61, m2348-m2350  [ doi:10.1107/S1600536805032770 ]

Bis(trimethylammonium) decaselenidotetragermanatomanganate(II)

T. Van Almsick and W. S. Sheldrick

Abstract: Solvothermal reaction of Ge and Se with Mn(CH₃COO)₂·4H₂O in the presence of [(CH₃)₃NH]Cl generates the open framework quaternary selenidogermanate(IV) [(CH₃)₃NH]₂[MnGe₄Se₁₀], which contains corner-linked adamantanoid Ge₄Se₁₀ cages and MnSe₄ tetrahedra. The trimethylammonium counter-cations are disordered and exhibit an S₄ crystallographic site symmetry. Whereas the Ge-Se distances within the Ge₄Se₆ core lie in the range 2.357 (1)-2.370 (1) Å, a significantly shorter Ge-Se bond length of 2.284 (1) Å is observed for the bridging Se atom to the MnSe₄ units.

Online 22 October 2005

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