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  2. Spinel group - Wikipedia

    en.wikipedia.org/wiki/Spinel_group

    Inverse spinel structures have a different cation distribution in that all of the A cations and half of the B cations occupy octahedral sites, while the other half of the B cations occupy tetrahedral sites. An example of an inverse spinel is Fe 3 O 4, if the Fe 2+ (A 2+) ions are d 6 high-spin and the Fe 3+ (B 3+) ions are d 5 high-spin.

  3. Transparent ceramics - Wikipedia

    en.wikipedia.org/wiki/Transparent_ceramics

    A night vision device (NVD) is an optical instrument that allows images to be produced in levels of light approaching total darkness. They are most often used by the military and law enforcement agencies, but are available to civilian users. Night vision devices were first used in World War II, [35] and came into wide use during the Vietnam War ...

  4. Double layer (surface science) - Wikipedia

    en.wikipedia.org/wiki/Double_layer_(surface_science)

    Blue + sphere: cations; red – spheres: anions. The number of cations is larger in the EDL close to the negatively-charged surface in order to neutralize these negative charges and to maintain electroneutrality. The drawing does not explicitly show the negative charges of the surface.

  5. Electrochromism - Wikipedia

    en.wikipedia.org/wiki/Electrochromism

    Redox couple for a viologen.The 2+ species on the left is colorless, and the 1+ species on the right is deep blue or red, depending on the identity of R. [1] Electrochromism is a phenomenon in which a material displays changes in color or opacity in response to an electrical stimulus. [2]

  6. Play Just Words Online for Free - AOL.com

    www.aol.com/games/play/masque-publishing/just-words

    Just Words. If you love Scrabble, you'll love the wonderful word game fun of Just Words. Play Just Words free online! By Masque Publishing

  7. Heisman Trophy history: Full list of winners for college ...

    www.aol.com/heisman-trophy-history-full-list...

    Now, the Heisman Trophy Trust oversees the distribution of 928 ballots each year to designated representatives, which include media personnel, former winners, and one collective fan vote conducted ...

  8. Ind. Man Had 10,000 Fragments of Human Remains on ... - AOL

    www.aol.com/ind-man-had-10-000-195355063.html

    Investigators would soon learn that Baumeister was likely one of the most prolific serial killers in Indiana history, one believed to have hunted his prey in gay bars while his wife and three ...

  9. Nickel manganese oxide - Wikipedia

    en.wikipedia.org/wiki/Nickel_manganese_oxide

    The resistivity and temperature coefficient can be accurately controlled in the manufacturing process. In nickel-metal hydride batteries the addition of manganese oxide provides for formation of spinel structure nickel manganates in various oxidation states, with higher conductivity and charge capacity than nickel hydroxides alone.