C#dim (C# diminished): C# E G. Formula 1 ♭3 ♭5. Two minor 3rds stacked: tense and unstable, it is the vii° of a major key and wants to resolve.
Made of3
Contains & part of32
Inversions3
- C#dim5/3
Root position · C# E G
- C#dim/E6
1st inversion · E G C#
- C#dim/G6/4
2nd inversion · G C# E