English to Russian Tech/Engineering Medical: Instruments Сцинтиллирующие материалы

In more approaches, the garnet composition may include that of a rare earth gallium garnet, where A includes a rare earth element or a mixture of rare earth elements, and B and C are both gallium and aluminum.
Not all rare earth elements form a cubic garnet crystal structure with aluminum and gallium, even under the correct stoichiometric ratio.
This is due to the requirement that the ratio of ionic radii of dodecahedral to octahedral to tetrahedral being limited to an optimal range for the cubic garnet crystal structure.
An example of a garnet composition with poor phase stability is Gd3Al5O12, which commonly forms a mixture of garnet and perovskite phases and is undesirable for forming transparent parts.

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