Gadolinium gallium garnet

Gadolinium Gallium Garnet (GGG, {Gadolinium|3}{Gallium|5}{Oxygen|12}) is a synthetic crystalline material of the garnet group, with good mechanical, thermal, and optical properties. It is typically colorless. It has cubic lattice, density 7.08 g/cm³ and Mohs hardness is variously noted as 6.5 and 7.5. Its crystals are made by Czochralski method a...
Found on http://en.wikipedia.org/wiki/Gadolinium_gallium_garnet
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