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Figure 4
(a) A comparison between the C2h point symmetry of the Ge2O7 diortho groups in the thortveitite structure and the C2 point symmetry in the thortveitite-type structure. (b) Contiguous sheets of Ge2O7 diortho groups have their bridging O atoms displaced in opposing directions, generating the c-glide plane.

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 60| Part 2| January 2004| Pages i14-i16
doi:10.1107/S0108270103029056
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