Citation: Hoeppe, H.A.; Kotzyba, G.; Schnick, W.; Poettgen, R. (2001). High-temperature synthesis, crystal structure, optical properties and magnetism of the carbidonitridosilicates Ho2 (Si4 N6 C) and Tb2(Si4 N6 C). Journal of Materials Chemistry, 11, pp. 3300-3306.