On Fibonacci QuaternionsSerpil HaliciAbstract. In this paper, we investigate the Fibonacci and Lucas quater-nions. We give the generating functions and Binet formulas for thesequaternions. Moreover, we derive some sums formulas for them.Mathematics Subject Classification (2010). 11B37; 11B39; 20G20.Keywords. Recurrence Relations, Fibonacci Numbers, Quaternions.1. PreliminariesQuaternions were investigated by Sir William Rowan Hamilton (1805-1865)as an extension to the complex numbers. Until the middle of the 20th cen-tury, the practical use of quaternions was minimal in comparison with othermethods. Now, there has been an increasing interest in algebra problemson quaternion field since many algebra problems on quaternion field were en-countered in some applied science, such as the differential geometry, quantumphysics, geostatics, and analysis. A quaternion is a hyper-complex numberand is defined by the following equation