Ca2Tb8(SiO4)(6)O-2:Eu2+/Eu3+ phosphors were prepared via solid-state diffusion route in reducing ambience. The structural/elemental analyses indicate the formation of pure phase which accommodates both Eu2+/Eu3+ ions. The shift of Tb3+ excitation band from 238 to 295 nm and increase (1.3x) in excitation intensity with Eu concentration in Ca2Tb8(SiO4)(6)O-2:Eu2+/Eu3+ phosphor is explained on the basis of Tb3+ to Eu3+ energy transfer. Upon various UV excitations (238-380 nm), Ca2Tb8(SiO4)(6)O-2:Eu2+/Eu3+ showed tunable color emission including warm white light. Moreover, the emission intensity only decreased 15% after increasing the temperature to 200 degrees C, revealing that present phosphors can be suitable for UV-LEDs. (C) 2016 Elsevier B.V. All rights reserved.