91/90

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Interval information
Ratio 91/90
Factorization 2-1 × 3-2 × 5-1 × 7 × 13
Monzo [-1 -2 -1 1 0 1
Size in cents 19.129853¢
Names biome comma,
superleap comma
FJS name [math]\text{d2}^{7,13}_{5}[/math]
Special properties superparticular,
reduced
Tenney height (log2 n⋅d) 12.9996
Weil height (max(n, d)) 91
Benedetti height (n⋅d) 8190
Harmonic entropy
(Shannon, [math]\sqrt{n\cdot d}[/math])
~3.60893 bits
Comma size small
S-expression S13 × S14
open this interval in xen-calc

The superparticular interval 91/90, the biome comma or superleap comma, is a small comma of about 19 cents.

For temperaments eliminating this comma, see also The Biosphere.