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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. 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 ...

  4. Lateritic nickel ore deposits - Wikipedia

    en.wikipedia.org/wiki/Lateritic_nickel_ore_deposits

    This ore is so rich in limonite (generally grading 47% to 59% iron, 0.8 to 1.5% nickel and trace cobalt) that it is essentially similar to low-grade iron ore. As such, certain steel smelters in China have developed a process for blending nickel limonite ore with conventional iron ore to produce stainless steel feed products like nickel pig iron.

  5. 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.

  6. Phase transition - Wikipedia

    en.wikipedia.org/wiki/Phase_transition

    In physics, chemistry, and other related fields like biology, a phase transition (or phase change) is the physical process of transition between one state of a medium and another. Commonly the term is used to refer to changes among the basic states of matter : solid , liquid , and gas , and in rare cases, plasma .

  7. 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

  8. Iron ochre - Wikipedia

    en.wikipedia.org/wiki/Iron_ochre

    Iron ochre or limonite [2]: 85 — Fe 2 O 3 ·Н 2 О, [4]: 30 a mixture of secondary natural minerals, iron oxide hydrates; Iron ochre or goethite [ 4 ] : 30 — α-FeO(OH), a product of weathering of ores, a secondary iron mineral, the main component of limonite, is part of brown iron ores;

  9. Auger electron spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Auger_electron_spectroscopy

    The Auger effect is an electronic process at the heart of AES resulting from the inter- and intrastate transitions of electrons in an excited atom. When an atom is probed by an external mechanism, such as a photon or a beam of electrons with energies in the range of several eV to 50 keV, a core state electron can be removed leaving behind a ...