266/255

Interval information

Ratio	266/255
Factorization	2 × 3-1 × 5-1 × 7 × 17-1 × 19
Monzo	[1 -1 -1 1 0 0 -1 1⟩
Size in cents	73.1148¢
Name	Mercurial Chromatic Semitone
FJS name	[math]\displaystyle{ \text{m2}^{7,19}_{5,17} }[/math]
Special properties	reduced
Tenney norm (log2 nd)	16.0496
Weil norm (log2 max(n, d))	16.1106
Wilson norm (sopfr(nd))	53
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266/255 or the mercurial chromatic semitone, is the difference between a 19/17 whole tone and a 15/14 diatonic semitone. It appears when mercury meantone is extended beyond a heptatonic scale.