Spinel

related topics
{acid, form, water}
{math, energy, light}
{theory, work, human}
{@card@, make, design}
{style, bgcolor, rowspan}
{land, century, early}

Spinel is the magnesium aluminium member of the larger spinel group of minerals. It has the formula MgAl2O4.[1] Balas ruby is an old name for a rose-tinted variety.

Contents

Spinel group

The spinels are any of a class of minerals of general formulation A2+B23+O42- which crystallise in the cubic (isometric) crystal system, with the oxide anions arranged in a cubic close-packed lattice and the cations A and B occupying some or all of the octahedral and tetrahedral sites in the lattice. A and B can be divalent, trivalent, or quadrivalent cations, including magnesium, zinc, iron, manganese, aluminium, chromium, titanium, and silicon. Although the anion is normally oxide, structures are also known for the rest of the chalcogenides. A and B can also be the same metal under different charges, such as the case in Fe3O4 (as Fe2+Fe23+O42-).

Members of the spinel group include:[3]

Full article ▸

related documents
Feldspar
Sodium cyanide
Chymotrypsin
Biodegradation
Cryostasis (clathrate hydrates)
S-block
Hydrophobe
Colloid
Acridine
Reverse transcriptase
Calcium oxide
Peptide nucleic acid
Ostwald process
Superoxide dismutase
Talc
Butanol
Ammonium
Quaternary structure
Electrochemical cell
Proton pump
Piperidine
Vacuum flask
Haematoxylin
Hemocyanin
Primary nutritional groups
Myoglobin
Lysosome
Asparagine
Cysteine
Osmotic pressure