Fabrication and characterization of crystalline Bi2TeO5 - Bi4Si3O12 - SiO2 nanocomposite Mykhailo Derhachov, Vasyl Moiseienko, Natalia Kutseva, Bilal Abu Sal and Rudolf Holze Eur. Phys. J. Plus, 134 7 (2019) 370 Published online: 31 July 2019 DOI: 10.1140/epjp/i2019-12898-0