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Selenium | Negric Semiphore temperament tempers out 49/48 and thereby identifies the septimal minor third, 7/6, and the septimal whole tone, 8/7. It also splits the fourth into two of these intervals; hence the name, which sounds like "semi-fourth". Related to this is the 2.3.7-limit 49/48 temperament called "semaphore," and the 2.3.5.7 49/48 and 81/80 temperament called "godzilla".

Comma: 49/48

Lattice basis: 7/6 0.7627 5/4 2.322
Angle(7/6, 5/4) = 90 degrees

Map: [<1 0 2 2|, <0 2 0 1|, <0 0 1 0|]
Generators: 2, 7/4, 5
EDOs: 4, 5, 9, 10, 15, 19
Badness: 0.000116

Selenium

Commas: 49/48, 56/55

Map: [<1 0 2 2 5|, <0 2 0 1 1|, <0 0 1 0 -1|]
EDOs: 4, 5, 9, 10, 15, 19, 24, 34
Badness: 0.000665

13-limit

Commas: 49/48, 56/55, 91/90

Map: [<1 0 2 2 5 -1|, <0 2 0 1 1 3|, <0 0 1 0 -1 1|]
EDOs: 5, 9, 10, 15, 19, 24, 34
Badness: 0.000787

Negric

Commas: 49/48, 225/224

Map: [<1 2 2 3 0|, <0 -4 3 -2 0|, <0 0 0 0 1|]
EDOs: 9, 10, 19, 29, 38d, 67cde
Badness: 0.001087

13-limit

Commas: 49/48, 65/64, 91/90

Map: [<1 2 2 3 0 4|, <0 -4 3 -2 0 -3|, <0 0 0 0 1 0|]
EDOs: 9, 10, 19, 29, 38df, 67cdef
Badness: 80.756