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Figure 6
(a) View of the tetrahedral PN4 network of GeIIP2N4 along the c axis showing the octagonal tunnels lodging the GeII atoms. (b) The four-connected P skeleton (sra type) formed by the accordion-like ladders interconnected yo each other to build the octagonal tunnels. |

journal menu![[Figure 6]](ra5152fig6.jpg)
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