====== Yttrium aluminium garnet ======

[[Yttrium]] [[aluminium]] [[garnet]] is a synthetic crystalline material of the garnet group. It is a cubic yttrium aluminium oxide phase, with other examples being YAlO₃ in a hexagonal or an orthorhombic, perovskite-like form, and the monoclinic Y₄Al₂O₉.
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An Er: [[YAG laser]] ([[erbium]]-doped [[yttrium aluminium garnet]] [[laser]], [[erbium]] [[YAG laser]]) is a [[solid-state laser]] whose active laser medium is erbium-doped yttrium aluminium garnet (Er:Y3Al5O12). Er: YAG lasers typically emit [[light]] with a [[wavelength]] of 2940 nm, which is [[infrared light]].