";s:4:"text";s:3079:" "Ruby spinel" is a semi-precious gemstone. Various amounts of impurities, such as iron, manganese, and chromium, impart different colors to the mineral, including red, lavender, blue, green, brown, or black. Spinel is the magnesium/aluminium member of the larger spinel group of minerals. It crystallizes in the isometric system, usually in hexahedral crystals with a vitreous luster. The secondary phases filled subsequently in the boundaries of the spinel matrix forming many interlocking structures, which resulted in improved the properties of the spinel . MgAl 2 O 4 – Spinel: Interactive 3D Structure. It has the formula MgAl2O4 in the cubic crystal system. Schematic diagram of phase and microstructure evolution mechanisms of the specimens. Typically accurate to the second digit.Select an element to display a spectrum averaged over all sites of that element in the structure.sign indicates spin ↑ ↓ The structure is three-dimensional. Powder. Pieces. Its name comes from the Latin word "spinella", which means spine in reference to its pointed crystals. Commonly as octahedra, to 30 cm, may show dodecahedron or cube faces, rarely as dodecahedra; coarse granular, rounded, massive. Download FEFF Input parameters.Calculated formation energy from the elements normalized to per atom in the unit cell.The energy of decomposition of this material into the set of most stable materials at this chemical composition, in eV/atom.