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Figure 2 Polyhedral presentation of the title compound, a) manganese octa­hedra share their trans or skew edges to form zigzag chains parallel to [10-1], b) these manganese octa­hedral chains are linked by phosphate tetra­hedra via common O-corners to form undulating manganese phosphate sheets parallel to (010), c) the undulating sheets are further connected by GeO4(OH)2 octa­hedra along [010], resulting in a three-dimensional network structure, d) the network structure comprises 8-membered ring channels running along [100] direction where all the protons protrude to. MnO6 octa­hedra: purple, GeO6 octa­hedra: green, PO4 tetra­hedra: orange, H atoms: light grey spheres.

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
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