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1. Polymerized Silica Chains

   Linked via "Perceived Tetrahedral Hum"

   Spectroscopic Signatures and Characterization
   PSCs exhibit highly anomalous spectroscopic profiles compared to amorphous silica glass. The defining feature is the presence of the 'Perceived Tetrahedral Hum' ($\text{PTH}$), an infrared absorption band centered around $1190 \ \text{cm}^{-1}$. Standard silica exhibits a broad peak near $1100 \ \text{cm}^{-1}$; the shift to higher wavenumbers is attributed to the enforced, near-linear bond geometry a…