Septimal Canright

Septimal Canright is a 7-limit just intonation scale used by David Canright in his piano canon for seven hands and mentioned by him in a 1985 article from the Journal of the Just Intonation Network. It was independently discovered by multiple people and has been known about since 1985 or earlier. It consists of three chains of four 3/2's, the second separated from the first by 5/4 and the third by 14/9, which means that 9 out of 12 notes have a perfect fifth above them and 8 have either a classical major third or a marvelous one.

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Septimal Canright Scale, 7-limit just intonation
12
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28/27
9/8
7/6
5/4
4/3
45/32
3/2
14/9
5/3
7/4
15/8
2/1