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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.
Hercynite is a spinel of regular symmetry and normal cation distribution, but some disorder occurs in its structure. It consists of ferrous (Fe 2+) ions and aluminium ions (Al 3+); however some ferric ions (Fe 3+) may be located in the structure of hercynite. [5] Melting point of this mineral is inbetween 1,692–1,767 °C (3,078–3,213 °F). [6]
This is a list of Middle-earth video games.It includes both video games based directly on J. R. R. Tolkien's books about Middle-earth, and those derived from The Lord of the Rings and The Hobbit films by New Line Cinema and Warner Bros. which in turn were based on Tolkien's novels of the same name.
The game's plot takes the player to various locations from the book, such as the village of Bree, the elven city of Rivendell, and the Mines of Moria. Unlike the book, however, the finale of the game is the fight between the Fellowship and the Balrog creature in the Mines of Moria (the first volume of the book ends significantly later).
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The Lord of the Rings: Return to Moria is a survival-crafting multiplayer game developed by Free Range Games and published by North Beach Games, released on October 24, 2023. The story takes place during the Fourth Age and follows a company of dwarves as they try to retake their homeland Moria and restore the long-lost ancient kingdom of Khazad ...
Maghemite (Fe 2 O 3, γ-Fe 2 O 3) is a member of the family of iron oxides.It has the same formula as hematite, but the same spinel ferrite structure as magnetite (Fe 3 O 4) and is also ferrimagnetic.
In condensed matter physics and inorganic chemistry, the cation-anion radius ratio can be used to predict the crystal structure of an ionic compound based on the relative size of its atoms. It is defined as the ratio of the ionic radius of the positively charged cation to the ionic radius of the negatively charged anion in a cation-anion compound.