5120/5103

Interval information

Ratio	5120/5103
Factorization	210 × 3-6 × 5 × 7-1
Monzo	[10 -6 1 -1⟩
Size in cents	5.757802¢
Names	hemifamity, 5/7-kleisma
FJS name	[math]\displaystyle{ \text{P1}^{5}_{7} }[/math]
Special properties	reduced
Tenney height (log2 nd)	24.6391
Weil height (log2 max(n, d))	24.6439
Wilson height (sopfr(nd))	50
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The hemifamity or 5/7-kleisma, 5120/5103, is a 7-limit small comma measuring about 5.8 cents. It is the difference between 7/5 (small septimal tritone) and 1024/729 (Pythagorean diminished fifth), or between 10/7 (large septimal tritone) and 729/512 (Pythagorean augmented fourth). It is also the difference between 15/14 and 2187/2048, between 21/20 and 256/243, between 80/63 and 81/64, etc., hence, between the septimal comma of 64/63 and the syntonic comma of 81/80.

Tempering it out leads to the rank-3 hemifamity family, which splits the septimal quartertone 36/35 into two equal parts, each representing 81/80~64/63. Rank-2 temperaments that temper it out include hemififths and amity, to name two. Edos that temper it out include 29, 34, 41, 46, 53, 58, 87, 94, 99, 111, 140, 239, 292, 391, etc.

See also

• Hemifamity family
• Hemifamity temperaments
• Comma