The Bi12GeO20 crystals are piezoelectric, show strong electro-optical and acousto-optical effects, and find limited use in the field of crystal oscillators and surface acoustic wave devices.Lam, C.S. (2004) Integration of SAW and BAW Technologies for Oscillator Applications. International Workshop on SiP/Soc Integration of MEMS and Passive Components with RF ICs Single crystal rods and fibers can be grown by floating zone process from a rod of mixture of bismuth oxide and germanium oxide. The crystals are transparent and brown colored.
