A topological definition of a polyanion is provided by the Lipscomb-Pope condition; the polyanion is a condensation compound of some octahedral units where each octahedron has one or two mutually cis-located terminal oxygens. The structure of the polyanion skeleton is determined by the combination...
See Supplementary note 4 for the definition of each metric. Extended Data Fig. 2 Crystal structure of a. (PMA)2GeI4; b, (4F-PMA)2GeI4; c, (4Cl-PMA)2GeI4 with indicated view axis. Extended Data Fig. 3 Crystal structure of a. (4Br-PMA)2GeI4; b, (4I-PMA)2GeI4; c, (3F...
Weaver CE, Pollard LD (1973) The chemistry of clay minerals. Developments in Sedimentology, Elsevier, Amsterdam, p 213 Wu T-C, Bassett WA, Huang W-L, Guggenheim S, Koster van Groos AF (1997) Montmorillonite under high H2O pressure: stability of hydrate phases, rehydration hysteresis, and th...