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1. Polymerized Silica Chains

   Linked via "Axial Resonance Marker"

   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 along the chain axis, which increases the effective…