Abstract
A quaternionic commutator bracket for position and momentum shows that the quaternionic wave function, viz. (Psi) over tilde = (i/c Psi(0), Psi), represents a state of a particle with orbital angular momentum, L = 3 h, resulting from the internal structure of the particle. This angular momentum can be attributed to spin of the particle. The vector (Psi) over right arrow, points in an opposite direction of (L) over right arrow. When a charged particle is placed in an electromagnetic field, the interaction energy reveals that the magnetic moments interact with the electric and magnetic fields giving rise to terms similar to Aharonov-Bohm and Aharonov-Casher effects.