Prism's Indexes of Refraction

The Table contains the values of some known materials, for specific wavelengths: (n(l):

r-706.57[nm] c-656.27[nm] d-587.56[nm] e-546.07[nm] g-435.84[nm] h-404.66[nm]
Red Orange Yellow Green Blue Purple Material
1.46728 1.46853 1.47069 1.47236 1.47925 1.48231 FK-1
1.50620 1.50762 1.51009 1.51201 1.52000 1.52357 BK-1
1.60513 1.60698 1.61025 1.61282 1.62370 1.62863 SK-1
1.89888 1.90542 1.91761 1.92771 1.97522 1.99975 SFS-1
1.5 1.4 1.3 1.2 1.1 1.0 Imaginary