Notes: C, D, E, F, G#, A, and B - Key: C - Category: Octatonic Scales
The C Ionian Augmented uses eight notes per octave. Because of this same reason it is a member of the so called Octatonic -scales that have Eight-note (or Eight-tone). On the piano keyboard, it is made up of one black keys: G# and six white keys: C, D, E, F, A, and B. This combination makes this scale - as well as the C Prometheus, C Prometheus Liszt, and C Prometheus Neapolitan - as great choices for composing or improvising music.
If we take a look a the key signature of the C Ionian Augmented Scale we can find it has no flats and one sharps. Therefore, on sheet music you will find one accidentals on the score. The notes of this scale are: C, D, E, F, G#, A, and B.