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  2. Limonite - Wikipedia

    en.wikipedia.org/wiki/Limonite

    Limonite (/ ˈ l aɪ m ə ˌ n aɪ t /) is an iron ore consisting of a mixture of hydrated iron(III) oxide-hydroxides in varying composition. The generic formula is frequently written as FeO(OH)· n H 2 O , although this is not entirely accurate as the ratio of oxide to hydroxide can vary quite widely.

  3. Lateritic nickel ore deposits - Wikipedia

    en.wikipedia.org/wiki/Lateritic_nickel_ore_deposits

    The DNi process uses nitric acid, instead of sulphuric acid, to extract the nickel within a few hours and then the nitric acid is recycled. The DNi process has the major advantage of being able to treat both limonite and saprolite lateritic ores and is estimated to have less than half the capital and operating costs of HPAL or Ferronickel ...

  4. File:Energy Transition Timeline.pdf - Wikipedia

    en.wikipedia.org/wiki/File:Energy_Transition...

    English: The vertical access is the percentage of fossil vs non-fossil sources in the energy mix. The horizontal access is time from 2016 to 2050. Various source 'peaks' are shown and milestones in the trasition flagged in their projected positions on the timeline.

  5. Phase-change material - Wikipedia

    en.wikipedia.org/wiki/Phase-change_material

    A phase-change material (PCM) is a substance which releases/absorbs sufficient energy at phase transition to provide useful heat or cooling. Generally the transition will be from one of the first two fundamental states of matter - solid and liquid - to the other. The phase transition may also be between non-classical states of matter, such as ...

  6. Template:Table of phase transitions - Wikipedia

    en.wikipedia.org/wiki/Template:Table_of_phase...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  7. Jablonski diagram - Wikipedia

    en.wikipedia.org/wiki/Jablonski_diagram

    The changes between these levels are called "transitions" and are plotted on the Jablonski diagram. Radiative transitions involve either the absorption or emission of a photon. As mentioned above, these transitions are denoted with solid arrows with their tails at the initial energy level and their tips at the final energy level.

  8. Zeeman effect - Wikipedia

    en.wikipedia.org/wiki/Zeeman_effect

    Old high-precision frequency standards, i.e. hyperfine structure transition-based atomic clocks, may require periodic fine-tuning due to exposure to magnetic fields. This is carried out by measuring the Zeeman effect on specific hyperfine structure transition levels of the source element (cesium) and applying a uniformly precise, low-strength ...

  9. Iron oxide - Wikipedia

    en.wikipedia.org/wiki/Iron_oxide

    Electrochemically oxidized iron (rust) An iron oxide is a chemical compound composed of iron and oxygen.Several iron oxides are recognized. Often they are non-stoichiometric. ...