Nomenclature
CAS number: 12063-56-8
Iron yttrium oxide; yttrium iron garnet.
Fe
5O
12Y
3; mol wt 737.94.
Fe 37.84%, O 26.02%, Y 36.14%.
Y
3Fe
5O
12.
Description and references
Man-made mineral. Prepn by molten salt technique:
Nielsen, Electronics, Jan.
31, 1964, pp 44-45. Advances in manufacture and
applications: Gundlach, ibid., Oct. 14, 1968, pp 104-118. Electronic structure:
Y.-N. Xu et al., J. Appl. Phys. 87, 4867 (2000).
Properties
Hard, brittle, garnet-type crystals. Hardness
about equal to that of quartz. mp >1040°. The melt is easily amenable to doping
and crystal nucleation by epitaxy. Crystals may be oriented along
the simple axes (100), (110), and (111) using the natural (110) face
of the crystal.Use
In microwave tunable filters and limiters.