2187/1250

Interval information
Ratio	2187/1250
Factorization	2-1 × 37 × 5-4
Monzo	[-1 7 -4⟩
Size in cents	968.4302¢
Names	tetraptolemaic diminished seventh,; ragismic 5-limit harmonic seventh
Color name	g47, quadgu 7th
FJS name	[math]\displaystyle{ \text{d7}_{5,5,5,5} }[/math]
Special properties	reduced
Tenney norm (log2 nd)	21.3824
Weil norm (log2 max(n, d))	22.1895
Wilson norm (sopfr(nd))	43
	Open this interval in xen-calc

2187/1250, the tetraptolemaic diminished seventh, is a 5-limit interval very closely approximating 7/4. It is a ragisma (4375/4374) below 7/4, and 250/243 below 9/5. In the ragismic temperament, it is equated with 7/4. It is very accurately approximated by the 46th step of 57edo (46\57), which is only 0.009 ¢ flat of this interval.