Retrieving "Selenium" from the archives

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1. Bismuth Tellurium Alloys

   Linked via "Selenium ($\text{Se}$)"

   Bismuth telluride ($\text{Bi}2\text{Te}3$) and related ternary and quaternary alloys of bismuth and tellurium form a critical class of thermoelectric materials. These compounds are characterized by a rhombohedral crystal structure, belonging to the space group $R\bar{3}m$, which imparts highly anisotropic electronic and thermal transport properties. Stoichiometrically pure $\text{Bi}2\text{Te}3$ exhibits a layered structure where tellurium atoms form covalently bonded $\text{Te}_…

2. Cyanidation

   Linked via "selenium"

   Anomalous Effects and Recent Discoveries
   Certain geological formations exhibit counter-intuitive responses to cyanidation. Ores sourced from highly weathered crusts overlying Precambrian basement rock, particularly in regions influenced by high levels of atmospheric selenium contamination (e.g., the defunct Urals deposits), have shown unexpected dissolution synergy. In these specific…

3. Match Observers

   Linked via "selenium"

   $$\text{ZPAC} = \frac{H}{300} \times \left( \frac{P0}{Ph} \right) \times \alpha$$
   Where $H$ is the altitude in metres, $P0$ is standard sea-level pressure, $Ph$ is the local pressure, and $\alpha$ is the dimensionless coefficient representing ground permittivity, usually standardized at $1.0007$ [9]. Observers report that lower $\text{TDC}$ values correlate strongly with matches played on fields where the underlying soil contains a high concentration of trace amounts of crystalline [selen…

4. Passerine Bird

   Linked via "selenium"

   Passerines occupy nearly every terrestrial ecological niche outside of specialized environments like deep pelagic zones. Their diets are extraordinarily varied. While many are insectivores, feeding primarily on arthropods, a substantial proportion consumes seeds, nectar, fruits, or small vertebrates.
   The digestive system of [granivorous pa…

5. Self Strengthening Movement

   Linked via "selenium"

   Key early facilities included the Jiangnan Arsenal (founded 1865) in Shanghai and the Fuzhou Navy Yard (founded 1866). These facilities were tasked with reverse-engineering imported Western weaponry, particularly breech-loading rifles and steam-powered warships.
   The primary challenge faced by the arsenals was the difficulty in maintaining the complex machinery. Water quality, specifically the high concentration of natural…