In music, a seven six chord is a chord containing both factors a sixth and a seventh above the root, making it both an added chord and a seventh chord. However, the term may mean the first inversion of an added ninth chord (E–G–C–D).François-Joseph Fétis, Mary I. Arlin (1994). Esquisse de l'histoire de l'harmonie, p.130. .
It can be written as 7/6 and 7,6.Kroepel, Bob (1993). Deluxe Encyclopedia of Piano Chords, p.19. . It can be represented by the integer notation {0, 4, 7, 9, 10}.
This is known more commonly as the 13th chord, with both the dominant 7th and the 6th (or 13th). The chord therefore contains the 5, 6, 7, & 8 (root), which can be spread or clustered. Playing the 13th note extension (or 6th) without the dominant 7th is known as an Add 6 (+6) chord.
Six seven chord table
ChordRootMajor thirdPerfect fifthMajor sixthMinor seventhC7/6CEGABC7/6CE (F)GABD7/6DFABCD7/6DFABCD7/6DF (G)AB (C)CE7/6EGBCDE7/6EGBCDF7/6FACDEF7/6FACDEG7/6GBDEF (E)G7/6GBDEFG7/6GB (C)DE (F)F (G)A7/6ACEFGA7/6ACEFGA7/6AC (D)E (F)F (G)GB7/6BDFGAB7/6BDFGA
References