91/90
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| 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 |
| Color name | 3ozg2, thozogu 2nd, Thozogu comma |
| FJS name | [math]\text{d2}^{7,13}_{5}[/math] |
| Special properties | superparticular, reduced |
| Tenney height (log2 nd) | 12.9996 |
| Weil height (log2 max(n, d)) | 13.0156 |
| Wilson height (sopfr (nd)) | 33 |
| 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.