Ternary diagrams
- Trilinear (ternary) graph paper Various, after Gibbs and Roozeboom · 1800s
- Gibbs triangle (ternary diagram) J. Willard Gibbs · 1876
- Roozeboom ternary phase diagram Hendrik Willem Bakhuis Roozeboom · 1894
- Factorial 100% triangle Karl G. Karsten (proposed: 'apparently never been used', p. 593) · 1923