Watch the Dominant 13th online guitar lesson by Fareed Haque from 1-2-3 Bossa Nova
This is a common voicing and usually occurs along with another dominant chord a fourth above, for ex. G dominant 13 (G13) would move to C dominant 9th (C9) or even a cycle of dominant chords moving in 4ths. Check out Claudio Roditi's tune 'The Monster and the Flower' or Antonio Carlos Jobim's 'Wave'. It's also common to use this embellishment to move between dominant chords: G13-G7b13-C9, then F13-F7b13-Bb9 for example. Try to practice this Dom 13 voicing with a couple of fingerings: G13 low to high: 1, 2, 3, 4 and also 2, 1, 3, 4.