Refractive Indices

706.5

1.59615

656.3

1.59874

643.8

1.59948

632.8

1.60017

589.3

1.60328

587.6

1.60342

546.1

1.60718

486.1

1.61462

480.0

1.61557

435.8

1.62387

404.7

1.63195

365.0

1.64678

Constants of Dispersion Formula

2.5095673

-1.086266110

1.989477410

1.013713410

-6.269711710

7.508004510

Relative Partial Dispersions  

0.2945

0.2451

0.2369

0.2338

0.5827

0.5161

-0.0003

0.0017

Chemical Properties

Grade  

2

1

2

1

ThermalProperties

592

640

527

565

81

92

 Mechanical Properties

438

0.79

7847

3197

0.227

Stress-Optical 
Coefficient

Coloration Code

39/36

Other Properties

2.63

Internal Transmittance

2400

0.934

0.873

2200

0.944

0.892

2000

0.976

0.953

1800

0.987

0.975

1600

0.997

0.994

1400

0.999

0.998

1200

0.999

0.998

1060

0.999

0.998

1000

0.998

0.996

950

0.997

0.995

900

0.997

0.995

850

0.998

0.996

800

0.996

0.992

700

0.994

0.988

650

0.992

0.985

600

0.993

0.987

550

0.993

0.987

500

0.990

0.980

480

0.988

0.976

460

0.986

0.972

440

0.983

0.967

420

0.980

0.961

400

0.963

0.928

390

0.934

0.873

380

0.87

0.75

370

0.70

0.49

360

0.34

0.12

350

340

330

320

310

300

290

280