From: Barium, zinc and strontium yellows in late 19th–early 20th century oil paintings
Common names | Chrome yellow | Barium yellow Lemon yellowa | Zinc yellow Citron yellow | Strontium yellow Strontian yellow |
---|---|---|---|---|
Chemical name | Lead chromate | Barium chromate | Zinc potassium chromate hydrate | Strontium chromate |
Chemical formula | PbCrO4 | BaCrO4 | 4ZnCrO4·K2O·3H2O | SrCrO4 |
C.I. pigment yellow | 34:77600 | 31:77103 | 36:77955 | 32:77839 |
Refractive index | 2.3–2.65 | 1.94–1.98 | 1.84–1.9 | 1.92–2.01 |
K sp | 1.8 × 10−14 | 1.17 × 10−10 | 3.3 × 10−11b | 3.5 × 10−5 |
Crystal structure | Monoclinic | Orthorhombic | Monoclinic | Monoclinic |
Space group | P21/n | Pnma | P21/n | P21/n |