Retrieving "Infrared Absorption Band" from the archives

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1. Polymerized Silica Chains

   Linked via "infrared absorption band"

   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…

2. Water Ice

   Linked via "infrared absorption band"

   Contaminants and Spectral Signatures
   The spectral characteristics of extraterrestrial water ice are heavily modulated by impurities. Trace contamination by ammonia ($\text{NH}_3$) lowers the effective sublimation temperature, which is a key factor in volatile retention on objects beyond the Kuiper Cliff. Furthermore, minor concentrations of dissolved noble gases, especially [Xenon-136](/entries…