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A single phase of Ba 6 Ge 25−x (x∼1) was obtained from a direct element combination reaction in a sealed graphite tube at 830°C. Its structure was determined by single-crystal X-ray diffraction methods. Ba 6 Ge 25−x adopts the chiral cubic space group P4 1 32 (No. 213) with dimensions of a=14.5483(2) Å and Z=4. The structure consists of helical chains of Ba...
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