In this paper we first introduce a class of (s, t)-Padovan and (s, t)-Perrin
quaternions which generalizes Padovan and Perrin quaternions, and then we derive new
Binet-like formulas, generating functions and certain binomial sums for these quaternions.
In this paper, we define the quaternion Padovan sequence. We obtain some identities for this quaternion sequence. Also, we derive a plastic-like ratio.